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【简答题】
自然光可用强度相等, ____ 的两个独立的线偏振光表示; ____ 可用强度不相等,振动面互相垂直的两个独立的线偏振光表示。
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反馈参考答案：
举一反三
【简答题】26 I want to suggest three alternative reasons for doing history, and for why it matters. The first is simply ‘enjoyment’. There is a pleasure in studying the past, just as there is in studying music ...
【单选题】Mom won’t let Dick go out ________ he promises to be back by 10:00 tonight.
A.
since
B.
when
C.
if
D.
unless
【简答题】Why is allowed us to plan a career?
【简答题】(1)What is career? _______________________________________________________ (2)Why is allowed us to plan a career? _______________________________________________________ (3)How can we know whether we ...
【单选题】---Don’t too late, or you will feel tired in class tomorrow. ---I won’t, Mom. Good night!
A.
wake up
B.
get up
C.
stand up
D.
stay up
【单选题】--Mom, guess what? I’ve won the 1st prize! ---This a celebration! Let’s go to prepare a party．
A.
helps out
B.
works out
C.
calls for
D.
pays for
【简答题】晕厥是暂时性知觉丧失现象，其主要发生原理是（）
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