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【多选题】
属于招标文件主要内容的是（ ）
A.
设计文件
B.
工程量清单
C.
施工方案
D.
投标书的编制要求
E.
选用的主要施工机械
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【单选题】已知一电压源的电动势为12V,内阻为2Ω,等效为电流源时,其电流和内阻应为( )。
A.
6A 2Ω
B.
3A  2Ω
C.
6A 3Ω
D.
3A 6Ω
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【单选题】下列操作中,适宜使用宏的是( )。
A.
处理报表中错误
B.
创建自定义过程
C.
修改数据表结构
D.
打开或关闭报表对象
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【单选题】已知一电压源的电动势为12V，内阻为2Ω，等效为电流源时，其电流和内阻应为（ ）。
A.
6A  3Ω
B.
3A  2Ω
C.
6A  2Ω
D.
3A  3Ω
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【简答题】Throughout the history of mankind, people have been asking, “Can it really happen?”The question was asked when people first thought of going out on the oceans. It was asked when Columbus set out on hi...
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【单选题】The largest set of wings on any bird, more than three meters across, is found on the albatross. They are so heavy that it is difficult for the albatross to flap them in order to take off and fly. Not ...
A.
The largest set of wings on any bird, more than three meters across, is found on the albatross.
B.
They are so heavy that it is difficult for the albatross to flap them in order to take off and fly.
C.
Not all large birds can fly.
D.
Albatross often nest on steep cliffs so that they can simply fall off into the air.
E.
Once they are airborne, they soar gracefully.
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【单选题】已知一电流源的电流为 5A ,内阻为 4Ω ,等效为电压源时,其电动势和内阻应为( )。
A.
20V   8Ω
B.
20V  4Ω
C.
10V   4Ω
D.
10V   8Ω
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【简答题】阅读理解 By now, a rocket will have set off on its 35-million-mile trip to Mars and scientists must be waiting for the results. The rocket will be travelling for six months before it reaches the planet. I...
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【单选题】下列操作中,适宜使用宏的是( )。
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修改数据表结构
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【单选题】I suggested that they set off early to avoid (避开) the traffic jam, ____________ no one respond
A.
32. I suggested that they set off early to avoid (避开) the traffic jam, ____________ no one responded. A．on which
B.
to which
C.
about which
D.
for which
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【单选题】已知一电压源的电动势为12V,内阻为2Ω,等效为电流源时,其电流和内阻应为( )。
A.
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3A  2Ω
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【单选题】下列操作中,适宜使用宏的是( )。
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【简答题】Throughout the history of mankind, people have been asking, “Can it really happen?”The question was asked when people first thought of going out on the oceans. It was asked when Columbus set out on hi...
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【单选题】The largest set of wings on any bird, more than three meters across, is found on the albatross. They are so heavy that it is difficult for the albatross to flap them in order to take off and fly. Not ...
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【单选题】已知一电流源的电流为 5A ,内阻为 4Ω ,等效为电压源时,其电动势和内阻应为( )。
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B.
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【简答题】阅读理解 By now, a rocket will have set off on its 35-million-mile trip to Mars and scientists must be waiting for the results. The rocket will be travelling for six months before it reaches the planet. I...
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【单选题】I suggested that they set off early to avoid (避开) the traffic jam, ____________ no one respond
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