自回归(autoregressive, ar)模型由（ ）提出 a g. e. p. box b g. m. jenkins c g. u. yule d bollerslov
哪种时间序列分析方法是从序列自相关的角度来分析（ ） a 描述性时序分析 b 频域分析 c 时域分析方法 d 谱分析
频域分析方法与时域分析方法相比（ ） a. 前者要求较强的数学基础，分析结果比较抽象，易于进行直观解释。 b. 后者要求较强的数学基础，分析结果比较抽象，不易于进行直观解释。 c. 前者理论基础扎实，操作步骤规范，分析结果易于解释。 d. 后者理论基础扎实，操作步骤规范，分析结果易于解释。
关于严平稳与（宽）平稳的关系，不正确的为( ) a. 严平稳序列不一定是宽平稳序列 b. 当序列服从正态分布时，两种平稳性等价 c. 二阶矩存在的严平稳序列一定为宽平稳的 d. 独立同分布的随机变量序列一定是宽平稳的
下列哪项属于平稳时间序列的自相关图特征？（ ） a. 自相关系数很快衰减为零 b. 自相关系数衰减为零的速度缓慢 c. 自相关系数一直为正 d. 在相关图上，呈现明显的三角对称性
利用时序图对时间序列的平稳性进行检验，下列说确的是（ ） a. 如果时序图呈现明显的递增态势，那么这个时间序列就是平稳序列。 b. 如果时序图呈现明显的周期态势，那么这个时间序列就是平稳序列。 c. 如果时序图总是围绕一个常数波动，而且其波动范围有限，那么这个时间序列是平稳序列。 d. 通过时序图不能够精确判断一个序列的平稳与否。
纯随机序列的说法，错误的是（ ） a. 纯随机序列是没有分析价值的序列 b. 纯随机序列的均值是零，方差是定值 c. 不同的时间序列平稳性检验，其延迟期数要求也不同 d. 由于观察值序列的有限性，纯随机序列的样本自相关系数不会绝对为零
对矩估计的评价，不正确的是（ ） a. 估计精度好 b. 估计思想简单直观 c. 不需要假设总体分布 d. 计算量小(低阶模型场合)
常见的时间序列分析方法包括（ ） a 描述性时序分析 b 频域分析 c 时域分析方法 d 谱分析
时域方法的特点包括 ( ) a 理论基础扎实 b 操作简单、直观有效 c 操作步骤规范 d 分析结果易于解释
part i: choose from the following groups of words the one you hear. each of the words will be read once only.
choose from the following groups of words the one you hear. each of the words will be read once only.
choose from the following groups of words the one you hear. each of the words will be read once only.
choose from the following groups of words the one you hear. each of the words will be read once only.
choose from the following groups of words the one you hear. each of the words will be read once only.
choose from the following groups of words the one you hear. each of the words will be read once only.
choose from the following groups of words the one you hear. each of the words will be read once only.
choose from the following groups of words the one you hear. each of the words will be read once only.
choose from the following groups of words the one you hear. each of the words will be read once only.
choose from the following groups of words the one you hear. each of the words will be read once only.
part ii: the following pairs of sentences are exactly the same except for one word. you will hear either sentence (a) or (b). choose the one you hear.
the following pairs of sentences are exactly the same except for one word. you will hear either sentence (a) or (b). choose the one you hear.
the following pairs of sentences are exactly the same except for one word. you will hear either sentence (a) or (b). choose the one you hear.
the following pairs of sentences are exactly the same except for one word. you will hear either sentence (a) or (b). choose the one you hear.
the following pairs of sentences are exactly the same except for one word. you will hear either sentence (a) or (b). choose the one you hear.
the following pairs of sentences are exactly the same except for one word. you will hear either sentence (a) or (b). choose the one you hear.
the following pairs of sentences are exactly the same except for one word. you will hear either sentence (a) or (b). choose the one you hear.
the following pairs of sentences are exactly the same except for one word. you will hear either sentence (a) or (b). choose the one you hear.
the following pairs of sentences are exactly the same except for one word. you will hear either sentence (a) or (b). choose the one you hear.
the following pairs of sentences are exactly the same except for one word. you will hear either sentence (a) or (b). choose the one you hear.
part iii： the following pairs of sentences are exactly the same, except a different word is stressed (stronger) in each sentence. choose the sentences you hear in each group.
the following pairs of sentences are exactly the same, except a different word is stressed (stronger) in each sentence. choose the sentences you hear in each group.
the following pairs of sentences are exactly the same, except a different word is stressed (stronger) in each sentence. choose the sentences you hear in each group.
the following pairs of sentences are exactly the same, except a different word is stressed (stronger) in each sentence. choose the sentences you hear in each group.
the following pairs of sentences are exactly the same, except a different word is stressed (stronger) in each sentence. choose the sentences you hear in each group.
part iv: listening comprehension: in this section, you are going to listen to hear 10 sentences. please listen carefully and decide which of the sentences in the three choices is closest in meaning to the one you hear.
in this section, you are going to listen to hear 10 sentences. please listen carefully and decide which of the sentences in the three choices is closest in meaning to the one you hear.
in this section, you are going to listen to hear 10 sentences. please listen carefully and decide which of the sentences in the three choices is closest in meaning to the one you hear.
in this section, you are going to listen to hear 10 sentences. please listen carefully and decide which of the sentences in the three choices is closest in meaning to the one you hear.
in this section, you are going to listen to hear 10 sentences. please listen carefully and decide which of the sentences in the three choices is closest in meaning to the one you hear.
in this section, you are going to listen to hear 10 sentences. please listen carefully and decide which of the sentences in the three choices is closest in meaning to the one you hear.
in this section, you are going to listen to hear 10 sentences. please listen carefully and decide which of the sentences in the three choices is closest in meaning to the one you hear.
in this section, you are going to listen to hear 10 sentences. please listen carefully and decide which of the sentences in the three choices is closest in meaning to the one you hear.
in this section, you are going to listen to hear 10 sentences. please listen carefully and decide which of the sentences in the three choices is closest in meaning to the one you hear.
in this section, you are going to listen to hear 10 sentences. please listen carefully and decide which of the sentences in the three choices is closest in meaning to the one you hear.
corporate culture corporate culture is described as the (1) _____________ of an organization, and guides how employees think, act, and feel.
it includes core values and beliefs, corporate ethics, and rules of behavior. it can be expressed in the company’s mission (2) _____________ and other communications,
in the architectural style or interior (3) _____________ of offices, and in the titles given to various employees. corporate culture affects you in many ways.
for instance: l the (4) __________ __________ per day, per week.
the (5) __________ __________, including employee interaction, competition degree, etc.
the (6) __________ __________, including the accepted styles of attire, etc.
the (7) __________ __________ you get, including cubicles, window offices, etc.
the (8) __________ __________ development.
onsite perks, such as break room, play room, etc. l the (9) __________ __________ outside the office.
(10) _____________ with other employers.
peak performances - moments when children (1) that's in them -
are the stuff of every parent's (2) .
and yet most of us have seen a report card or heard a trumpet solo that (3)
what our kids can (4) .
why can some boys and girls repeatedly pull themselves to the (5)
while others of equal or (6) cannot?
many parents assume skill is pretty much determined by (7)
the student with the highest i.q. will get the best grades, or the athlete with the most prowess will (8) .
genes (9) in determining performance, but they're not everything.
the edge comes from mental attitude, character and (10) .
there are some simple ways for parents to help their youngsters develop those (11)
find something to praise. a child who feels good about himself (12)
assess your child's (13)
encourage self-applause. knowing how to relax is key to (14) .
a good report card (15) near your daughter's mirror reminds
her that she can do well and (16) to repeat her success.
there are no (17) to bringing your child to do his best.
it's a (18) of support, encouragement and hard work.
and those efforts (19) not only in peak performance
not only in peak performance but also in (20) between parent and child.
news item from voa, bbc and cri part i directions: listen to the news item and complete the following passage. creating a classroom environment that treats women and men equally is important for the educational success of students. however ____1______ equality does not stop with the teacher.
it is also important that the ____2______ used are supporting _____3_____ treatment.
in fact, many classroom materials, especially those that are older, may contain gender bias in _____4_____, photos, or words.
these materials can include textbooks, _____5_____, reading materials, written assignments, or even test materials.
having students use materials like these in class can reinforce _____6_____ about gender roles in society.
classroom materials that reinforce gender stereotypes can ____7______ students,
weaken their motivation and limit their overall _____8_____ performance.
this can result in fewer opportunities available to students when they finish their schooling. research has found that stereotypes and gender bias in english language materials do _____9_____.
several studies by the united nations educational, scientific, and cultural organization, or unesco, have found that some texts ____10______ women, contain stereotypes about women or offensive comments about women.
in addition, research has found that _____11_____ in teaching materials
often show a male _____12_____.
one study on high school english language textbooks in iran found that male characterizations were used as much as _____13_____ of the time.
one study on high school english language textbooks in iran found that male characterizations were used as much as _____13_____ % of the time.（请填写数字）
the first step is to understand how to identify gender bias in textbooks. examine the image below. these images were taken from an english language textbook. what do you notice about how the men and women are being _____14_____?
in this image there are six people, four men and two women, shown in different jobs. the men pictured include a construction worker, a doctor, a police officer, and a truck driver. the women shown include a farm worker and a food store employee. this image shows men and women in _____15____ jobs in two ways.
first, male representation is double that of female. second, the men generally are working in higher-level, more economically powerful jobs. now look at a short reading activity from an actual english language textbook. what do you notice about the ________ of men and women in the example?
part ii directions: listen to the news item and complete the following passage. a new report says about ___1__ people
a day have been forced to __2__ their homes in african conflict
and __3__ zones.
figures show that more than __4__ people in africa are internally displaced. （请填文字）
nearly __5___left their homes last year.（请填文字）
part iii directions: listen to the news item and complete the following passage. britain's most prestigious ___1___art award,
the turner prize have been won by an art professor who was born in zanzibar, lubaina himid. judges __2___ her work
which explored the african diaspora and black ___3__.
professor himid is the first black woman and the oldest person to win the__4__.
part ii. passage (shadowing and gist) directions: listen to the passage and choose the best answer to each of the following questions. what does the speaker really describe in the speech?
irections: listen to the passage and choose the best answer to each of the following questions. how do specialists comment on this study method?
directions: listen to the passage and choose the best answer to each of the following questions. how effectively can the average person learn during sleep as in the same period during the day?
directions: listen to the passage and choose the best answer to each of the following questions. what does sleep-teaching do?
directions: listen to the passage and choose the best answer to each of the following questions. what did the student have to do for another three hours before having breakfast?
part iii. news (shadowing and gist) a. directions: listen to the news item and complete the following summary. this news item is about .
directions: listen to the news item and choose the best answer to complete the following sentences. opposition parties are demanding after a violent protest over voting problems tuesday.
there were at least killed and injured during the voting.
people at more than 100 voting places .
show the ruling general people’s congress party in the lead.
part i (note-taking) directions: listen to a talk about light and health. take notes and complete the following summary. can light affect your health? many researchers believe that light can affect both your physical and your （1） .
from daylight, our bodies absorb vitamin d through the skin. certain skin diseases also （2） from exposure to sunlight.
light absorbed through the eye can stimulate hormone production, which in turn （3） our mood.
some people become （4） in winter, when the days are dark and most people spend less time in the open air.
when spring comes, these （5） disappear. researchers have called this condition sad -- seasonal affective depression.
the condition can be （6） by exposing patients to special lights, known as full-spectrum lights.
this lighting has also been used to treat patients （7） from jet-lag, to improve learning in school-children in russia and america,
and the （8） of japanese factory workers
young people need at least fifteen minutes a day in real daylight in summer （9） in winter.
old people, who risk vitamin d deficiency, should spend even longer exposed to （10） daylight.