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【单选题】
渐开线的性质叙述正确的是 ( )A.
基圆越小，渐开线越趋平直
B.
渐开线上各点的曲率半径相等
C.
渐开线上各点的压力角相等，等于 20 °
D.
基圆相同，渐开线形状也相同
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举一反三
【简答题】Many great men have risen from poverty; ______, Lincoln and Edison.
【单选题】My hometown has taken on a new look. ___________!
A.
Great changes have been taken place
B.
What great change
C.
How it has changed
D.
How great it has changed
【简答题】对于业务量较少的账户，会计软件可以提供会计账簿的满页打印。（ ）
【单选题】________ great progress he has made this term ! He feels _______ .
A.
What a ,excited
B.
What, excited
C.
How ,excited
D.
How an ,exciting
【简答题】What has risen greatly in the U.S. since 1980?A. The number of overweight kids. B. The amount of corn being added to our foods. C. The number of the items in the average supermarket. D. Both A and B.
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