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【单选题】
一元羧酸酯的结构通式是A.
一 R-CO-R 元羧酸酯的结构通式是
B.
R-O-R
C.
R-COO-R
D.
R-COOH
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【简答题】槽轮机构有何特点?
【单选题】---Do you often watch this kind of program? ---No. This is the first time I ____ this kind. It’s funny.
A.
watched
B.
watch
C.
have watched
D.
had watched
【简答题】Sentence Structures: Rewrite the following sentences after the model. Model: He knew he didn't need to be afraid to make mistakes at that moment. ——>(强调主语)It was he who/that knew he didn't need to be ...
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【单选题】19 I don’t like this kind of watch. Will you show me _________? A: the other B: the others C: another D: others E: other
A.
B.
C.
D.
E.
E
【单选题】I don't like this kind of watch. Will you please show me __ one.
A.
another
B.
other.
C.
others.
D.
the other
【简答题】主音位置相同的大小调,叫作( ),也叫同名大小调。
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