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【单选题】
由主食玉米缺乏烟酸及色氨酸引起()。A.
糙皮病
B.
脚气病
C.
坏血病
D.
结石
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反馈参考答案：
举一反三
【简答题】A．1,000 copies. B．1,010 copies. C．10,000 copies. D．11,000 copies.
【单选题】What is Olga unsure of?
A.
Who to send copies to
B.
How many copies to make
C.
When Kelsey's is closing
D.
Where Kelsey's is located
【单选题】听力原文：W: We have made ten copies． M: At first it's planned to need ten copies, and now we don't need so many. Five would be enough. Q: How many unnecessary copies they have made? (3)
A.
Five.
B.
Four.
C.
Six.
D.
Seven.
【简答题】It produces more copies at a minute.
【单选题】Recent stories in the newspapers and magazines suggest that teaching and research contra diet each other that research plays too prominent a part in academic promotions, and that teaching is badly und...
A.
It is wrong to overestimate the importance of teaching.
B.
Teaching and research are contradictory to each other.
C.
Research can never be emphasized too much.
D.
The relationship between teaching and research should not be simplified.
【单选题】A copy machine makes 60 copies per minute. A second copy machine makes 80 copies per minute. The second machine starts making copies 2 minutes after the first machine starts. Both machines stop making...
A.
480
B.
600
C.
680
D.
720
E.
960
【简答题】contra-=_____
【简答题】A．Four million copies. B．Four billion copies. C．Thir million copies. D．Thirty million copies.
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