A.He didn't know that she was enrolled in a linear algebra course.
B.He thought she preferred to study alone.
C.He thought she had made arrangements to study with.
D.He had told her that he had done poorly on a recent test.
第1题
涂料一般由 三部分组成。
A.真溶剂、潜溶剂、助溶剂
B.着色颜料、树脂、稀释剂
C.主要成膜物质、次要成膜物质、辅助成膜物质
D.树脂、清漆、底漆
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