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【简答题】
关于光电效应，下列说法中正确的是哪几个? (1)任何波长的可见光照射到任何金属表面产生光电效应． (2)对同一有光电子产生，则入射光的频率不同，光电子的最大初动能也不同． (3)对同一金属由于入射光的波长不同，单位时间内产生的光电子的数目不同． (4)对同一金属，若入射光频率不变，而强度增加一倍，则饱和光电流也增加1倍．
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【简答题】根据危险化学品的判定步骤,请指出氯化钾是否应该作为危险化学品进行管理?
【简答题】Select ONE answer choice that best completes each blank of the following sentences. 1. The whole affair was based on evidence from a(n) ____ from the secret service, who claimed that the secret servic...
【多选题】注册会计师对已登记入账的销售业务的真实性进行实质性测试时，有效的方法是( )。
A.
从主营业务收入明细账追查至连续编号的销货交易记录清单
B.
从主营业务收入明细账追查至与销货分录相应的销货审批单
C.
从主营业务收入明细账追查至应收账款明细账中贷方发生额的记录
D.
从主营业务收入明细账追查至发运凭证及其他佐证凭证
【单选题】The classic working-class "mum," living at home to look after her numerous children with the man as the bread-winner, was a folk myth sustained by the population census in the 1970s which______less an...
A.
conforms
B.
resembles
C.
is similar
D.
is identical
【多选题】The classic ICC work The Silent Language was written by .
A.
The founder of ICC
B.
An anthropologist working in the Foreign Service Institute in the U.S.
C.
Edward Hall
D.
Navajo and Hopi
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