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【单选题】
In this circuit, the diode is ideal diode(forward voltage is 0). If input voltage ui is sinusoidal wave, when ui>0, uo=__________. When ui<0, uo=_______. This circuit is called _____________ circuit.A.
0, ui, half-wave rectification.
B.
ui, ui, half-wave rectification.
C.
ui, 0, half-wave rectifivation
D.
ui, 0, full-wave rectifivation
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举一反三
【多选题】关于账户分析指标的描述正确的是
A.
账户分析的指标主要有展现量、点击量、消费、点击率、转化量、转化率和转化成本等
B.
在分析时不能用单纯的结果指标来衡量推广效果
C.
一般整体维度、细节维度适合用转化成本来评估
D.
页面和客服两个相关维度使用转化率指标来评估
【单选题】---Where are your parents? ---They are in the kitchen, they ______the dinner for the party the whole day.
A.
are preparing
B.
have been prepared
C.
have been preparing
D.
were preparing
【简答题】Want to be perfect at a holiday dinner party? Follow these tips on good manners, and your dinner companions are sure to be thankful. *Arrive no earlier than the time the host has announced and no late...
【单选题】— Why did the dinner party start so late last night? — It was _____ that caused him to serve dinner an hour later than usual.
A.
we were late
B.
we being late
C.
our being late
D.
because we were late
【简答题】按定额构成的生产要素怎么分类?
【单选题】In ice, each water molecule forms ____ hydrogen bonds, the maximum possible for a water molecule.
A.
2
B.
3
C.
4
D.
5
【单选题】A molecule is made of ____, for example, a water molecule contains two hydrogens and one oxygen.
A.
electrons
B.
neutrons
C.
protons
D.
atoms
【简答题】Harry was behaving very (child)______ at the dinner party last night.
【简答题】Joe: How did the dinner party go? Jane: ______.
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