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【判断题】
短齿制齿轮与对应的正常齿制齿轮分度圆相同,而齿根圆和齿顶圆不同。A.
正确
B.
错误
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【单选题】—Which is the longest river in China,the Changjiang River or the Yellow River? —The Changjiang River. The Yellow River is river in China.
A.
the second longest
B.
the second longer
C.
a second longest
D.
the second long
【单选题】We often associate the Yellow River and the Changjiang River______ the civilization of the Chinese people.
A.
by
B.
to
C.
from
D.
with
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