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【简答题】
具有内向整流特性的离子流是:
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参考答案:
参考解析:
知识点:
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..
皮皮学刷刷变学霸
举一反三
【判断题】A、B、C、D、E、F、G对应的音符是6、7、1、2、3、4、5。
A.
正确
B.
错误
【单选题】患者排尿突然中断,变换体位可继续排尿应考虑( )。
A.
膀胱结石
B.
前列腺炎
C.
前列腺增生
D.
输尿管结石
【单选题】图示正弦交流RLC串联电路,已知电压有效值 V, V, V,则 等于 答 ( )
A.
V
B.
V
C.
V
D.
V
【单选题】若已知正弦电压【图片】V,该交流电压的有效值为( )
A.
V
B.
220V
C.
314V
D.
60V
【单选题】Not only the sailors but also the captain of the ship _____ frightened during that voyage.
A.
has
B.
have
C.
was
D.
were
【单选题】In the opinion of many Americans and Europeans, we only began to really explore our world in the sixteenth century. According to them, the sailors of the ancient world did not explore distant parts of...
A.
According to the writer, we only began to really explore the world in the sixteenth century.
B.
In the history of science, people sometimes have to discover a fact a second time.
C.
The ancient Egyptians had very little knowledge about the stars.
D.
The writer agrees with many Americans and Europeans except for the two facts mentioned in the passage.
【单选题】正弦交流的基本概念---20008 已知某正弦电压 V, 当 时 V, 当 时, V, 则该正弦电压有效值 等于 答( ) 答( )
A.
100V
B.
86.6V
C.
70.7V
D.
122.5V
【简答题】正弦交流电网电压值,如380V,220V,指的是( )。
【单选题】正弦交流的基本概念---20051 已知某正弦电压 V,当 时 V,当 时 V,则该正弦电压对应有效值相量 等于 答( ) 答( )
A.
V
B.
V
C.
V
D.
V
【单选题】假设,某跨境进口零售公司年度目标4800万。年度平均商品周转率目标为8。A月的销售目标为360万。A月初的库存应该为多少?
A.
400
B.
450
C.
570
D.
600
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