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【简答题】
Girls first wear the neck rings at ______ years old.
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反馈参考答案：
举一反三
【单选题】在使用扫描隧道显微镜STM时,刚进入隧道模式后,若针尖和样品间的距离减小一半,则隧道电流如何变化?
A.
减小一半
B.
增大一倍
C.
不变
D.
变化极大,可达数十倍以上
【简答题】临床常用的升压药是 ____,临床常用的强心药是 ____ 。
【简答题】危险源识别方法有哪些?
【单选题】Lucy’s parents are going on a study trip with ________.
A.
a friend of them
B.
a fiend of their
C.
a friend of theirs
D.
the friend of them
【单选题】1A: I got a terrible e-mail from Vincent. He doesn’t want to be my friend anymore. B:_____________________But he’s been your friend for years .I’m sure he will change his mind.
A.
How could she do that to you?
B.
The same thing happened to me.
C.
I’m really sorry to hear that. Forget about it.
D.
That must be hard on you.
E.
Tell me about it.
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