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【单选题】
如图所示阶梯杆,受三个集中力F作用,设AB,BC,CD三个横截面面积分别为A,2A,3A,则三段杆横截面上的A.
轴力不等，应力相等
B.
轴力相等，应力不等
C.
轴力不等，应力不等
D.
轴力相等，应力相等
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举一反三
【单选题】All the following sentences have an appositive EXCEPT_____
A.
They each want to something different.
B.
My husband will go there himself.
C.
His favourite exercise is playing tennis after work.
D.
Lucy was born in a small town of North America, the daughter of a poor and ignorant miner.
【单选题】Something terrible have happened if Li Chang was not coming to eat in his restaurant as he always did.
A.
ought to
B.
must
C.
should
D.
will
【简答题】十三(仿真实验).在计算机上完成图像增强、分割、图像复原等要求的仿真实验,并完成相关分析。
【单选题】— Mum, Bill is coming to dinner this evening. — Ok, Let's give him ______ to eat. [ ]
A.
something different
B.
different anything
C.
anything different
D.
different something
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