皮皮学，免费搜题
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【单选题】
以下属于齿轮传动的优点的是 。A.
传动效率高
B.
加工和安装精度要求高
C.
制造成本高
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皮皮学刷刷变学霸
举一反三
【单选题】I’m sorry I'll have to ___ your present.
A.
turn off
B.
turn out
C.
turn over
D.
turn down
【单选题】When I am in difficulty, I always ____ him for help. [ ]
A.
turn out
B.
turn over
C.
turn to
D.
turn on
【简答题】词汇运用 1. -Do you like __________(tomato)? -Yes, very much. 2. -Can he __________(turn) off the light? -Yes, he can. 3. It's half past seven now. Sandy __________(write) a letter to her friend. 4. -How ...
【单选题】I want to watch the news on TV. _____, please. [ ]
A.
Turn on it
B.
Turn it on
C.
Turn off it
D.
Turn it off
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