【判断题】【消耗次数：1】
采用轮系传动可以实现无级变速。
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正确
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错误
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【判断题】
现代数控机床的主运动广泛采用无级变速传动，用交流调速电动机或直流调速电动机驱动，它们能方便地实现无级变速，且传动链短，传动件少，提高了变速的可靠性。该说法（ ）
①
正确
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错误
随机题目
【单选题】
A: Im sorry. Robert is not in his office. B: [填空]?
①
Are you sure for that
②
Would you like to leave a message
③
Can you take a message for me
④
Can he phone me
【单选题】
A: Were you at home last night? B: [填空].
①
Certainly
②
Certainly I was
③
Sure I was
④
O.K
【单选题】
A: What would you like, sir? B: [填空].
①
Two cups of coffees
②
Two coffees
③
Two cup of coffee
④
Two cups coffee
【单选题】
A: [填空], Mr. John? You dont look very well. B: Ive had a pain in my chest since this morning.
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How are you
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Whats your trouble
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How are you feeling
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How are you getting on
【单选题】
—Do you mind if Charlie borrows a few hundred dollars from you?—Im afraid I do. Ill be glad to lend money to _____ but Charlie.
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someone
②
everyone
③
anyone
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no one
【单选题】
Will you see to _____ that the flowers are well protected during the rainy season?
①
it
②
me
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/
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yourself
【单选题】
A: That was a great dinner. [填空] B: Thanks. But it really only took an hour.
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I have never had it before.
②
You must have spent all day cooking.
③
I enjoyed it very much.
④
Who cooked it?
【单选题】
The cruelty of the Germans towards the Jews and ______ of the Japanese towards their prisoners, filled _____ with horror.
①
those; someone
②
that; everyone
③
no one
④
this; anyone
【单选题】
Of all the movies Hepbum made ______ is more memorable than “Breakfast at Tiffanys”.
①
few
②
little
③
no one
④
none
【单选题】
A: Its very kind of you to show me the way. B: [填空].
①
Youre welcome
②
It was nothing
③
Not at all
④
Never mind