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【单选题】
一对渐开线齿轮连续传动的条件是 ( )A.
εa >1
B.
εa=1
C.
εa<1
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举一反三
【单选题】Which of the following．is NOT one of the effects of multivitamins mentioned in the passage7．
A.
To reduce the rate of babies born too early．
B.
To reduce the risk of low birth we]ight．
C.
To reduce fetal deaths in pregnant women infected with HIV．
D.
To increase the number of lymphocytes in mothers’blood．
【单选题】Which one of the following statements is NOT the suggestion given by the author of the text?
A.
Learn to like yourselves.
B.
Avoid over-thinking and social comparison.
C.
Learn to be optimistic.
D.
Be extroverted.
【单选题】听力原文：M: Hello? W: Hello. I'm calling about the apartment that was advertised in the paper this morning. Is it still available? M: There were two, a three bedroom and a two bedroom. But the larger one ...
A.
To put an ad in the newspaper.
B.
To renovate the apartment.
C.
To rent the apartment.
D.
To sell the apartment.
【单选题】Would you please send ______ a doctor? My grandfather is ill. [ ]
A.
away
B.
for
C.
off
【单选题】Which one of following is wrong about Abraham Lincoln?( )
A.
He was the 16th president of America.
B.
He was killed in 1865 when the Civil War was just finished.
C.
He was a businessman and then became politician.
D.
He was born in a poor farm family.
【单选题】听力原文：M: Hello, will you please send someone up to my apartment? The hot water is running, and I can't turn it off. W: Sorry, my men are all out now. But I'll send one up as soon as possible. Q: Who ha...
A.
A plumber.
B.
An electrician.
C.
A salesman.
D.
A policeman.
【单选题】Please___ to your parents. —Thank you. Also send my wishes to your parents.
A.
give my greet
B.
make the congratulation
C.
bring my thank
D.
send my greetings
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