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【简答题】
当光从空气斜射入玻璃等透明物质中时，折射角______入射角；当光从玻璃等透明物质斜射入空气中时，折射角______入射角；当光垂直射到玻璃表面时，光的传播方向______．
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举一反三
【简答题】You ____that letter to James. However, you didn’t.
【单选题】I appreciate ______that letter for me.
A.
you to write
B.
your writing
C.
you write
D.
that you writing
【单选题】You that letter to James. However, you didn't.
A.
ought to write
B.
ought to have written
C.
should write
D.
should be writing
【单选题】听力原文：W: Did you read that letter in the newspaper about smoking? The person who wrote that must be crazy. M: I don't think so. I think the government should do everything it can to discourage people f...
A.
A man.
B.
A letter in the newspaper.
C.
A law.
D.
The government.
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