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【判断题】
齿轮传动的振动和噪声是由于齿轮传递运动的不准确性引起的。( )A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【简答题】Michael used to look hurt and surprised when _____. (A) scolding (B) to scold (C) having scolded (D) scolded
【单选题】Michael used to look hurt and surprised when( ) .
A.
scolding
B.
to scold
C.
having scolded
D.
scolded
【简答题】Michael used to look hurt and surprised when ．
【单选题】Michael used to look nervous when ______ .
A.
scold
B.
to be scolded
C.
scolding
D.
scolded
【简答题】Michael used to look hurt and surprised when ________. A) scolding B) to scold C) having scolded D) scolded
【简答题】Michael used to look hurt and surprised when _____. (A) scolding (B) to scold (C) having scolded (D) scolded
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