题目内容

在圆柱槽摩擦轮传动中,可能不会出现( ) 现象。

A. 打滑
B. 几何滑动
C. 弹性滑动
D. A+B

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摩擦轮传动在两轮的表面通过接触区的过程中,摩擦力使( )。

A. 主动轮表面始终受压
B. 从动轮表面始终受压
C. 主动轮表面先受压后受拉,从动轮表面则反之
D. 从动轮表面先受压后受拉,主动轮表面则反之

1. We ______ up the courage to ask the high-rank official exactly what it’s like down those forbidden streets.A. stooped B. mastered C. mustered D. took2. But they need less space because they ______ around poles or sticks.A. turned B. circle C. curve D. twist3. The Golden Gate Bridge is the ninth longest _____ bridge in the world.A. suspend B. suspension C. suspending D. suspended4. We watched him hand her some pretty pink flowers and _____ against her cheek.A. leanB. whisper C. talk D. weep5. In _____, he decided to go back to Beijing.A. desperation B. desperate C. depressed D. depressing6. What an odd_____that he should have known your family.A. chance B. coincidenceC. accident D. incident7. She'd lowered her voice until it was barely_____.A. audible B. edibleC. unbearable D. unhearable8. Constant wheelchair use will _____ almost any floor surface.A. destroy B. ruinC. scuff D. break9. A_____is something that seems impossible but happens anyway.A. mystery B. wonder C. miracle D. magic10. The pupil _____ to pick up the paper craps on the floor.A. loweredB. stooped C. moved D. forwarded

出现0态冒险的电路一般用的是()类型的门。

A. 与
B. 或
C. 非
D. 异或

出现1态冒险的电路一般用的是()类型的门。

A. 与
B. 或
C. 非
D. 异或

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