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【多选题】
铰链四杆机构存在曲柄的条件是A.
最短杆与最长杆的长度和小于或等于其他两杆长度之和
B.
连架杆和机架其一为最短
C.
最短杆与最长杆的长度和大于其他两杆长度之和
D.
最短杆为连杆
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【单选题】I didn’t go out with him a second time ( ) once was more than enough.
A.
;
B.
,
C.
--
D.
/
【判断题】I don't let him go out in this weather in case he should catch cold. 是in case引导的目的状语从句。
A.
正确
B.
错误
【单选题】—Mom, Tom asked me to play football with him. Shall I go out now? —______. Be careful and don’t play in the street.
A.
Yes,you will
B.
With pleasure
C.
Of course not
D.
Sure
【简答题】完型填空 A little boy 1 afraid of the dark. One night his mother told him to go out to the backroom 2 bring her the broom. The little boy turned to his mother and said, 'Mom, I don't want to go out there....
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