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【单选题】
变压器的电压比为3:1，若一次电流的有效值为3A，则二次电流的有效值为( )。A.
27A
B.
9A
C.
1A
D.
OA
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举一反三
【单选题】It will be safer to walk the streets because people will not need to carry large amounts of cash virtually all financial ______ will be conducted by computer.
A.
transactions
B.
transmissions
C.
transitions
D.
transformations
【单选题】It will be safer to walk the streets because people will not need to carry large amounts of cash. Virtually all financial ______ will be conducted by computer.
A.
transactions
B.
transmissions
C.
transitions
D.
transformations
【单选题】某企业无优先股，去年普通股股数没有发生增减变化，每股收益为4元，每股发放股利2元，留存收益在过去一年中增加了500万。年底每股净资产为30元，负债总额5000万元，则该企业年末资产负债率为
A.
30%
B.
33%
C.
40%
D.
44%
【简答题】公差带的位置是由什么决定的
【单选题】It will be safer to walk the streets because people will not need to carry large amounts of cash virtually all financial ______ will be conducted by computer.
A.
transactions
B.
transmissions
C.
transitions
D.
transformation
【单选题】People who do not have wood must spend large amounts of money ________cooking fuel.
A.
on
B.
of
C.
in
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