connecting Rod

The lower end of each piston rod is reduced in diameter to fit a bore in （）， this being secured to the piston rod by a nut.

理想运算放大器______。 A: Au为∞，rid为0，rod为∞ B: Au为∞，rid为∞，rod为0 C: Au为∞，rid为∞，rod为∞ D: 以上都不对

The outside diameter of the pipe is （） the diameter of the bore of the piston rod， the result being that an annular space formed between the piston rod and the pipe.

The lightning rod is one of his useful _______________________.

The maximum shear stress in the rod in tension and compression is 40MPa, then the maximum normal stress in the rod is equal to . A: 80MPa B: 40MPa C: 60MPa D: 56.6MPa

The small end of the connecting rod is attached to the piston with a （）.

理想运放的Aod= 、rid= 、rod=

I didn't want to dignify rod with an answer

An equal cross-section straight rod is exerted by the loads shown in the figure, the cross-sectional area of the rod is A=100mm2. Determine the normal stress on the cross-section m-k.http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/23fd5f3f3d6d4bb99e3cc743abf84ff6.png