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【多选题】
下列关于力偶说法错误的是( )A.
力偶引起刚体移动
B.
力偶与矩心位置有关
C.
力偶没有投影
D.
力偶不能用一个力代替
E.
力偶可以用与力相平衡
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皮皮学刷刷变学霸
举一反三
【单选题】What are the three general purposes for giving speeches?
A.
To persuade, act , & adjust your speaking style
B.
To inform, persuade, & entertain
C.
To inform, make people laugh, & have fun
D.
None of the Above
【简答题】化简（1） 27 - 12 + 45 计算（2） si n 2 45°- 27 + 1 2 ( 3 -2006 ) 0 +6tan30°
【单选题】According to the passage, successful game strategy depends on______.
A.
the ability to adjust one's behavior. in light of the behavior. of others
B.
one's awareness that there is safety in numbers
C.
the degree of stability one can create in one's immediate environment
D.
the accuracy with which one can predict future events
【单选题】选择一个选项将该句补充完整:We are very sorry that the product you bought is sold_____. Would you mind exchanging it to others in our store?( )
A.
off
B.
away
C.
out
D.
on
【单选题】It is difficult to ________ the sample that is on the slide unless the microscope is adjusted properly.
A.
overlook
B.
discern
C.
disclaim
D.
distract
【单选题】— Is Nie’er Library ______ to ordinary people? — Of course.
A.
accessible
B.
available
C.
reasonable
D.
adjustable
【简答题】计算： （1） 12 - 27 （2） 6 × 15 × 10 （3） ( 2 +2 3 )( 2 -2 3 )
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