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【单选题】
渐开线圆柱齿轮精度的国家标准(GB/T10095.1至.2-2008)中对齿轮及齿轮副规定了共_____个精度等级。A.
10
B.
11
C.
12
D.
13
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举一反三
【单选题】At the conference, people of different _______ were given a chance to exchange theirs with each other.
A.
points
B.
manners
C.
views
D.
ways
【单选题】听力原文：(A) They are looking through the microscopes. (B) They are sitting next to each other. (C) The couple is watching dolphins. (D) They are sitting on the table.
A.
B.
C.
【简答题】A．People might lose respect for each other. B．People might have less trust in each other. C．The operation of the team will not be improved. D．There would be more differences between each other.
【单选题】Everymeans ___ tried but without any result.
A.
have been
B.
is to be
C.
are tobe
D.
has been
【单选题】The two old sisters，_______ so long，held each other and burst into tears.
A.
being separated
B.
having been separated
C.
having separated
D.
had been separated
【单选题】Everymeans ___________ tried but without much result.
A.
has been
B.
have been
C.
are
D.
is
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