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【多选题】
蜗杆传动的主要特点是（）A.
工作平稳
B.
蜗杆螺旋角小时可具有自锁的作用
C.
传动效率高
D.
价格比较昂贵
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【简答题】我国的税款征收方式主要有（ ）。
【简答题】( ) 1 -How many ____ have you got on your farm? -I've got five. A. sheeps B. sheep C. pig ( ) 2 Some ___ came to our school for a visit that day. A. Germans B. Germen C. Germany ( ) 3 In the ...
【简答题】我国的税款征收方式主要有（ ）。
【单选题】根据以下内容回答题： As contrasts go，there are few other pairs of culture as distinct from each other as the Japa-nese and the Americans．Japan’s many centuries of history and especially its Buddhist heritage ha...
A.
most obvious
B.
slightest
C.
Same
D.
less suitable
【简答题】我国的税款征收方式主要有（ ）。
【简答题】我国的税款征收方式主要有（ ）。
【单选题】How many non-bonding pairs of electrons are there in a nitrogen molecule?
A.
0
B.
1
C.
2
D.
3
【简答题】Read the following pairs of thesis statements. Tick the one in each pair that you think is better. Discuss your answers with a partner. a. ............There are several advantages of owning a car, but...
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