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【判断题】
从社会公平和效率的总体角度看，中等收入者边际税率可以适当高些，低收入者和高收入者应适用相对较低的税率
A.
正确
B.
错误
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【简答题】有一批半径为1cm的球,为了提高球面的光洁度,要镀上一层铜,厚度定为0.01cm,估计每只球需用铜 g 。(计算结果保留2位小数,铜的密度是 )
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【单选题】A circuit breaker differs from a fuse in that a circuit breaker
A.
melts and must be replaced
B.
is enclosed in a tube of insulating material with metal ferrules at each end
C.
gives no visual indication of having opened the circuit
D.
trips to break the circuit and may reset
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【单选题】Ice-breaker assistance for convoy will start at 1930 UTC.
A.
Ice-breaker assistance for fleet passage started at 1930 UTC.
B.
Ice-breaker assistance for fleet passage is due to start at 1930 UTC.
C.
Ice-breaker assistance for M.V. Convoy started at 1930 UTC.
D.
Ice-breaker assistance for M.V. Convoy is due to start at 1930 UTC.
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【单选题】040mol/L碳酸溶液的PH值为（）。（Ka1=4.2×10-7,Ka2=5.6×10-11）
A.
3.89
B.
4.01
C.
3.87
D.
6.77
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【简答题】有一批半径为 1cm 的球 , 为了提高球面的光洁度 , 要镀上一层铜 , 厚度定为 0 . 01cm . 估计一了每只球需用铜多少 g ( 铜的密度是 8. 9g/cm 3 )?
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【单选题】breaker
A.
轧钢机
B.
粉碎机
C.
断电器
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【单选题】Ice-breaker assistance for convoy will start at 1930UTC
A.
Ice-breaker assistance for fleet passage stared at 1930UTC
B.
Ice-breaker assistance for fleet passage is due to start at 1930UTC
C.
Ice-breaker assistance for M.V. Convoy started at 1930UTC
D.
Ice-breaker assistance for M.V. Convoy is due to start at 1930UTC
查看完整题目与答案
【单选题】A circuit breaker differs from a fuse in that a circuit breaker （）.
A.
melts and must be replaced
B.
is enclosed in a tube of insulating material with metal ferrules at each end
C.
gives no visual indication of having opened the circuit
D.
trips to break the circuit and may be reset
查看完整题目与答案
【单选题】A breaker's cheque is a negotiable instrument.
A.
正确
B.
错误
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【单选题】The purpose of a main switchboard circuit breaker's reverse power trip is to _____.
A.
prevent main circuit overload
B.
protect the circuit breaker blowout coil
C.
prevent alternator motorization
D.
prevent low voltage tripout
查看完整题目与答案
相关题目：
【简答题】有一批半径为1cm的球,为了提高球面的光洁度,要镀上一层铜,厚度定为0.01cm,估计每只球需用铜 g 。(计算结果保留2位小数,铜的密度是 )
查看完整题目与答案
【单选题】A circuit breaker differs from a fuse in that a circuit breaker
A.
melts and must be replaced
B.
is enclosed in a tube of insulating material with metal ferrules at each end
C.
gives no visual indication of having opened the circuit
D.
trips to break the circuit and may reset
查看完整题目与答案
【单选题】Ice-breaker assistance for convoy will start at 1930 UTC.
A.
Ice-breaker assistance for fleet passage started at 1930 UTC.
B.
Ice-breaker assistance for fleet passage is due to start at 1930 UTC.
C.
Ice-breaker assistance for M.V. Convoy started at 1930 UTC.
D.
Ice-breaker assistance for M.V. Convoy is due to start at 1930 UTC.
查看完整题目与答案
【单选题】040mol/L碳酸溶液的PH值为（）。（Ka1=4.2×10-7,Ka2=5.6×10-11）
A.
3.89
B.
4.01
C.
3.87
D.
6.77
查看完整题目与答案
【简答题】有一批半径为 1cm 的球 , 为了提高球面的光洁度 , 要镀上一层铜 , 厚度定为 0 . 01cm . 估计一了每只球需用铜多少 g ( 铜的密度是 8. 9g/cm 3 )?
查看完整题目与答案
【单选题】breaker
A.
轧钢机
B.
粉碎机
C.
断电器
查看完整题目与答案
【单选题】Ice-breaker assistance for convoy will start at 1930UTC
A.
Ice-breaker assistance for fleet passage stared at 1930UTC
B.
Ice-breaker assistance for fleet passage is due to start at 1930UTC
C.
Ice-breaker assistance for M.V. Convoy started at 1930UTC
D.
Ice-breaker assistance for M.V. Convoy is due to start at 1930UTC
查看完整题目与答案
【单选题】A circuit breaker differs from a fuse in that a circuit breaker （）.
A.
melts and must be replaced
B.
is enclosed in a tube of insulating material with metal ferrules at each end
C.
gives no visual indication of having opened the circuit
D.
trips to break the circuit and may be reset
查看完整题目与答案
【单选题】A breaker's cheque is a negotiable instrument.
A.
正确
B.
错误
查看完整题目与答案
【单选题】The purpose of a main switchboard circuit breaker's reverse power trip is to _____.
A.
prevent main circuit overload
B.
protect the circuit breaker blowout coil
C.
prevent alternator motorization
D.
prevent low voltage tripout
查看完整题目与答案