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【简答题】
Correct the errors in the following sentences. 1 They didn't see each other since September. 2) Gina is in college for one year. 3) She has worked at the cafeteria since nine months. 4) He always arrived at his office on time before. 5) He never had a problem with his boss. 6 Did you ever take the telephone orders before? 7) In the last three months, Robert trained more than twenty new employees. 8) Robert has started to use a computer when he was an office worker. 9) Robert attended several important business meetings in the last three years. 10) So far they already got six traveler's checks
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【简答题】根据解决问题的方向思维可以分为______、_______。
【单选题】He jumped onto the train just as it was pulling ______.
A.
off
B.
out
C.
down
D.
away
【单选题】关于夹具结构的工艺性,下列说法错误的是 。
A.
首先尽量选用标准件和通用件，以降低设计和制造费用； 其次要考虑加工的工艺性及经济性。
B.
专用夹具制造 必须采用调整、整修、装配后加工等工艺方法来达到最终精度要求。
C.
专用夹具制造可以采用 在使用机床上就地加工等工艺方法来达到最终精度要求。
D.
在确定夹具结构尺寸及公差时，应同时考虑夹具上有关尺寸及形位公差的检验方法，。
【简答题】A．Over 60 percent of them are single mothers with small children. B．Around 20 percent of them are mentally ill. C．These people usually have a large family. D．The typical 'street person' is a white mal...
【单选题】He jumped onto the train just as it was pulling __________.
A.
in
B.
off
C.
away
D.
for
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