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【单选题】
一个点电荷放在球形高斯面的中心处,下列()情况可使通过高斯面的电通量发生变化。A.
将另一个点电荷放在高斯面外。
B.
将球心处的点电荷移开,但仍在高斯面内
C.
将另一点电荷放在高斯面内
D.
将高斯面半径缩小
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反馈参考答案：
举一反三
【简答题】将高级语言程序设计语言源程序翻译成计算机可执行代码的软件称为()A. 汇编程序 B. 编译程序 C. 管理程序 D. 服务程序
【简答题】Scientists are uncovering the secrets of two port cities lost under the waters of the Mediterranean Sea, a researcher said yesterday. Herakleion and Menouthis were rich and proud cities until somethin...
【单选题】For the purposes of cargo oil containment，the fixed container under the manifold of an eight-inch loading line must hold a minimum of ______.
A.
three barrels
B.
four barrels
C.
six barrels
D.
eight barrels
【单选题】Under the influence of drug-friendly pop music, what might the youth think of the death of some pop stars caused by overdose?
A.
They tend to mourn the pop stars as role models.
B.
They are shocked to know even pop stars may abuse drugs.
C.
They try to confront the deadly effect of 'recreational' drug use.
D.
They may stop abusing the drugs.
【单选题】Under the leadership of Derek Bok, the Harvard conducted the reform. of undergraduate course through the Core Curriculum.
A.
Y
B.
N
C.
NG
【简答题】表达式2+5*3==21的布尔值是
【单选题】How old are the children to be immunised?
A.
Under the age of four.
B.
Under the age of five.
C.
Under the age of six.
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