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【多选题】
对元电荷的理解 , 下列说法正确的是 ( )A.
元电荷是最小单元 , 其值是 1.60 ×10 -19 C
B.
元电荷就是质子
C.
物体所带的电荷量只能是元电荷的整数倍
D.
元电荷就是电子
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【单选题】____ she is not so cheerful _____ she used to be? [ ]
A.
How is it that; as
B.
Why is it that; what
C.
Is it why; that
D.
How it is that; as
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【简答题】Summarise the text by filling the blanks. To escape from Nazi 1 of the Jews, Anne and her family
members 2 from Germany to Holland. However, in 1940 the
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【判断题】There is a conference hall that seats four hundred persons in the hotel, and eight meeting rooms which seat twenty persons.
A.
正确
B.
错误
【多选题】以下说法正确的是( )
A.
可口可乐的决策者坎德勒花费了600万美元购买了山姆森设计的玻璃瓶专利。
B.
绿茶以细嫩柔软，红艳明亮，色泽调匀者为优。
C.
瓷砖表面的莫氏硬度大概在6-7之间，有些石英砂硬度却大于7，两者摩擦，瓷砖表面会被其划伤。
D.
马口铁是镀铬的铁皮，在完好的保护层下，金属光泽持久不变，又耐生锈。
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