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【简答题】
简要说明多晶（纳米晶体）、单晶及非晶衍射花样的特征及形成原理。
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Can you describe _____? [ ]
A.
how your friend is like
B.
what does your friend look like
C.
how your friend like is
D.
what your friend is like
【单选题】— ______? — He's great. [ ]
A.
What's your friend
B.
How does your friend know it
C.
What do you think of your friend
D.
How do you know your friend
【单选题】关于信号【图片】描述正确的是__________。
A.
该信号的基波频率是 1 Hz
B.
该信号是非周期信号。
C.
该信号的基波角频率是 1 rad/s。
D.
该信号的平均功率是 0.25 W。
【单选题】One advantage of doing shopping with your friend is that your friend can pay for what you want.
A.
Y
B.
N
C.
NG
【单选题】late for school again?
A.
Don’t
B.
Are your friend
C.
Is your friend
D.
Does your friend
【单选题】What will your support mean to your friend?
A.
It may help your friend succeed.
B.
It may let your friend feel valued.
C.
It may make your friend find his true self.
D.
It may make your friend feel closer to you.
【单选题】关于信号【图片】描述正确的是（ ）。
A.
该信号是非周期信号。
B.
该信号的基波角频率是 1 rad/s。
C.
该信号的基波频率是 1 Hz。
D.
该信号的平均功率是 0.25 W。
【单选题】You and your friend are enrolled in the same class. You do not have time to study and ask your friend if you can copy from him during the exam. Your friend reluctantly agrees. Has your friend commi...
A.
Yes
B.
No
C.
It depends
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