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【单选题】
在PN结中形成空间电荷区的正、负离子都带电，所以空间电荷区的电阻率（ ）。A. 很高 B. 很低 C. 等于N型或P型半导体的电阻率A.
A
B.
B
C.
C
D.
0
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【单选题】听力原文：(A) There is a sign placed in front of the store. (B) The sign is being written. (C) The trees are for sale. (D) The flowers in the pot are covered in snow.
A.
B.
C.
D.
【简答题】C：阅读下面材料，从每题所给的三个选项（A、B和C）中，选出最佳选项。 There is a sign at a Korean university asking tourists not to step into the grass to take photos. The sign is not written in Korean or English; it is written in Chi...
【单选题】There is a sign at the train station, reading “Don’t jump off a train when it’s .”
A.
on move
B.
on a move
C.
on the move
D.
moving
【单选题】根据《中国共产党党章》规定,下列关于党的地方各级代表大会和党的地方各级委员会的说法错误的一项是( )
A.
党的地方代表大会如提前或延期举行，由它选举的委员会的任期相应地改变。
B.
党的地方各级委员会的委员和候补委员的名额，分别由上一级委员会决定。
C.
党的地方各级委员会全体会议，每年至少召开一次。
D.
党的地方各级委员会在代表大会闭会期间，执行上级党组织的指示和同济党代表大会的决议，领导本地方的工作，定期向上级党的委员会报告工作。
【简答题】教育思想史上具有代表性的教育目的论主要有 、 和教育无目的论。
【简答题】There is a new park near my house. It’s a fine day today. My family and I are in the park now. On my left, there is a cafe. On my right, there is a big lake. There are many flowers and trees near the ...
【单选题】— ______ keep talking? — Because there is a sign that says'Be quiet!' [ ]
A.
Why not
B.
Why
C.
Shall we
【单选题】—You can see Mr. Smith if there is a sign '______' on the door of his shop. —Thanks.
A.
THIS SIDE UP
B.
NO SMOKING
C.
BUSINESS HOURS
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