皮皮学，免费搜题
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【单选题】
能把转动运动转换成往复直线运动,也可以把往复直线运动转换成转动运动。A.
曲柄摇杆机构
B.
双曲柄机构
C.
双摇杆机构
D.
曲柄滑决机构
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】______ a great time on your school trip? [ ]
A.
Did you have
B.
Do you have
C.
Are you spending
D.
Are you
【单选题】Do you have ________to do the work ________?
A.
enough time, good enough
B.
time enough, enough good
C.
enough time, well enough
D.
time enough, enough well
【单选题】Plan your time carefully and make sure you have some time ______ what you like every day.
A.
do
B.
to do
C.
doing
D.
done
【单选题】What time do you usually _____ in the morning? [ ]
A.
have a breakfast
B.
have breakfast
C.
have the breakfast
D.
have breakfasts
【简答题】What must you do to have plenty of time to eat breakfast? We must ______ to have plenty of time to eat breakfast.
【单选题】--- Do you have the time? --- ______
A.
Yes, I do.
B.
No, I don’t
C.
Twenty past eight.
D.
Surely, I have a watch.
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