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【单选题】
当光从光密介质射向光疏介质时,当入射角( )临界角时,会发生全反射现象。A.
等于
B.
大于
C.
小于或等于
D.
等于或大于
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反馈参考答案：
举一反三
【单选题】Mary ______ lots of charity work in her free time since she entered college.
A.
has done
B.
will do
C.
was doing
D.
is doing
【单选题】听力原文：M: I haven't heard from Nancy since she entered medical school. I wonder how she's doing. W: Well, I understand she gave our department secretary her new address and phone number. Why don't you t...
A.
Visit Nancy at her new department.
B.
Call on Nancy at her medical school.
C.
Give the secretary Nancy's new phone number.
D.
Get information about Nancy from the secretary.
【判断题】犀牛软件中，一个工具按钮代表了一种命令。由于整合度不够，因此同一个工具按钮可能存在多个工具列里面。判断它们是否是一样，可以通过它们的图标是否一致来判断。（ ）
A.
正确
B.
错误
【简答题】Since she entered college, ____________(在英语学习上有很大的进步).
【单选题】Nancy _____ lots of charity work in her free time since she entered college.
A.
has done
B.
will do
C.
was doing
D.
is doing
【简答题】What did everyone press her to do, since she lost every race she entered?
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