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【简答题】
由于栅氧化层中通常带（）电荷，所以（）型区比（）型区更容易发生反型。
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反馈参考答案：
举一反三
【单选题】You should give up smoking because it is bad for you.
A.
try
B.
agree
C.
quit
D.
decide
【单选题】To decide whether you can successfully transplant a tree yourself, you should ______.
A.
select your location carefully
B.
measure the ball of earth around the tree roots
C.
measure the diameter of the tree trunk
D.
cut off as many taproots as you can reach
【简答题】________ you decide to take up, you should try to make it a success. A) If only B) Unless C) Whatever D) Whenever
【简答题】________ you decide to take up you should try to make it a success. A) Whatever B) Unless C) Whenever D) If only
【单选题】下列命题正确的是 [ ]
A.
三点可以确定一个圆
B.
以定点为圆心,定长为半径可确定一个圆
C.
顶点在圆上的三角形叫圆的外接三角形
D.
等腰三角形的外心一定在这个三角形内
【单选题】______ you decide to take up, you should try to make it a success.
A.
Whatever
B.
Unless
C.
Whenever
D.
If only
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