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【简答题】
It’s not unusual for teenagers to go through a(n) ___ when they feel ashamed of their parents, afraid that they might not live up to their friends’ standards.
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反馈参考答案：
举一反三
【多选题】有一交流电 ,加在电感L为100mH的电感线圈两端,下面叙述正确的是
A.
流过电感的电流的初相位是零度。
B.
流过电感的电流最大值是12.1A
C.
感抗XL是31.4Ω。
D.
流过电感的电流瞬时值表达式为
【简答题】线性电感元件是指电感量L为______的电感。
【单选题】加在感抗 X L =10 Ω 纯电感两端的电压 u L = 20sin （ ωt+π/6 ） V ，则通过它的电流是（ ）。
A.
i L =2sin （ ωt+π/3 ） A ;
B.
i L =2 sin （ ωt-π/3 ） A ;
C.
i L = 2sin （ ωt+π/6 ） A ;
D.
i L = 2sin （ ωt-π/6 ） A ;
【单选题】Read the text of UNIT 2 Neat People vs. Sloppy People, what's the writer's purpose of writing this passage?
A.
Compare the differences between neat people and sloppy people
B.
Discuss the causes of difference between neat people and sloppy people
C.
To disprove the conventional attitudes toward neat people and sloppy people
D.
Criticize neat people for their insensitivity.
【简答题】两电感元件L 1 和L 2 并联，求其等值电感；若将L 1 和L 2 串联，再求其等值电感。
【简答题】流动电感L的电流从0升至I时，电感L吸收的磁场能为()。
【单选题】According to the passage, sloppy writing ______.
A.
parallels a social tendency of being informal
B.
worries students as well as professors
C.
is taken as trivial by employers
D.
is ignored in all business concerned sciences
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