1. on average 70% of people’s time is engaged in listening.
【单选题】
开环传递函数为g(s)h(s)=k/s³（s 3）,则实轴上的根轨迹为（ ）
14. fill in the blanks with the following words: random randomly randomize to play the game, first _____________ the order of the numbers.
2. if the roi formula yields a negative number, what does this mean?
【单选题】
collaborative help
采用负反馈形式连接后，则 ( )
2. the ability to listen for the main idea is useful for both our everyday lives and our academic lives.
正穿越是相角增加的穿越，负穿越是相角减小的穿越。
前馈补偿控制属于基本控制方式中的哪种（ ）
you can use_________ to describe those villagers who often welcome visitors warmly and treat them with generosity.
3. sometimes when children go to mcdonald’s, if they buy certain amount of food they can get some toys free of charge or with some pay. we call this form of advertising “product placement”.
2. advertisers sometimes use _________ to make tv commercials to be able to impress tv viewers, but it can be quite annoying.
organizations that operate under _________structure have linear authority and specialized teams that allow for creativity and innovation.