题目内容
(请给出正确答案)
[主观题]
The teacher asked me ________. A.whether or not I had finished my work B.did I finish my
work or not C.is my work finished or not D.if or not I have finished my work whether or not
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第8题
A.甘油明胶
B.纤维素衍生物
C.卡波普
D.聚乙二醇400
E.凡士林
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