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【判断题】
由于壳式结构比较简单,绕组的布置和绝缘也比较容易,因此我国电力变压器主要采用壳式,只在一些特种变压器(如电炉变压器)中才采用心式。()A.
正确
B.
错误
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【单选题】楼梯踏步的计算公式常为: ( ) ,其中 h 为踏步高, b 为踏步宽。
A.
h+b=600
B.
2h+b=660 mm
C.
h+b=450 mm
D.
2h+b=450 mm
【单选题】The writer seems to hope that______.
A.
most of the lottery money will be used for cancer research
B.
most of the lottery money will go to charity
C.
people will give more money to charity
D.
people will spend more money on the National Lottery
【多选题】楼梯踏步的计算公式常为( ),其中h为踏步高,b为踏步宽。
A.
h+b=600mm
B.
2h+b=600~620mm
C.
h+b=450mm
D.
2h+b=450mm
E.
h+2b=600mm
【多选题】楼梯踏步的计算公式常为（），其中h为踏步高，b为踏步宽。
A.
h+b=600mm
B.
2h+b=600mm
C.
h+b=450mm
D.
2h+b=450mm
E.
h+2b=600mm
【多选题】楼梯踏步的计算公式常为 ( ) ,其中 h 为踏步高, b 为踏步宽。
A.
2h+b=600mm
B.
2h+b=450mm
C.
h+b=450mm
D.
h+b=500mm
【简答题】As we know, most of the material things in our daily life have to be bought with money. But money is not all powerful. Money can't buy many things such as time and true love. There are 24 hours in a d...
【单选题】(Track lighting) is one of the most popular types, (if not) the most popular type, (of) lighting (on market) today.
A.
Track lighting
B.
if not
C.
of
D.
on market
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