the shear stress developed at point a on the surface of the shaft is ( ). the shaft has a radius of 60 mm.
闭区间上仅有有限个间断点的函数必可积
函数和是同一函数的原函数
the wires ab and ac are made of steel, and wire ad is made of copper. before the 150-lb force is applied, ab and ac are each 60 in. long and ad is 40 in. long. if the temperature is increased by , determine the force in each wire needed to support the load. take , , , . each wire has a cross-sectional area of 0.0123 .
闭区间上可积的函数必连续
在计算含有项的不定积分时，常用的换元是
the shear formula is to be used on strainght priatic members made of ( ) material that has ( ) behavior. also, the internal resultant shear force must be directed along an axis of ( ) of the cross-sectional area.
,是定义在上的非负函数且,那么有
the rigid pipe is supported by a pin at a and an a-36 guy wire bd. if the wire has a diameter of 0.25 in., determine the load p if the end c is displaced 0.075 in. downward.
函数列的收敛域是实数域。
以下计算过程是否正确：
由极坐标曲线（其中连续可微且导数不为0）以及直线 （其中）和轴所围图形的面积为
在有理函数的部分分式分解中————————
the intensity of the ( ) at a point in the body is referred to as stress. stress is the ( ) value of force per unit area, as the area approaches ( ). for this definition, the material is considered to be ( ) and ( ).
教育科研网的缩写为()。
there are two stages in secondary education in the us, that is, ________ .
the us federal government was permitted to give special favors to any religion or to hinder the free practice, or exercise, of religion.
the uk is bordered by three seas and one ocean.
scotland is the most populous among the four parts of the uk.
________ was often regarded as america’s first man of letters, father of american literature, devoting much of his career to literature.
which of the following statements of us senate or senator are true?
the direct cause for the religious reformation was king henry viii’s effort to_____.
the real center of power in parliament is_____.
which of the following statements about radio broadcasting in america is not true?
在下面的visual foxpro表达式中，运算结果是逻辑真的是
on the way to the wedding, seeing ____ is considered good luck.
“the function of education is to teach one to think intensively and to think critically. intelligence plus character– that is the goal of true education.” was a remark by ____ .