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【判断题】
胶体的稳定性主要包括两个方面动力学稳定和聚集稳定，其中聚集稳定在胶体稳定中起关键作用。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】听力原文：W: I'm in charge of buying the fruit for the children at our church. I'm so happy to find that apples and gs are in season. Give me two dozens of each. M: I hope that they're as good as they ...
A.
8.
B.
12.
C.
36.
D.
24.
【单选题】听力原文：M: Will that be cash or charge? W: I want to pay by check if I may. M: Certainly. That’s cash, then. W: Cash? M: Yes, Both money and checks are considered cash. Only credit cards are charge. W: O...
A.
To help the woman make a purchase.
B.
To request the woman’s identification.
C.
To show the woman for a course at City College.
D.
To register the woman how to make out a check.
【单选题】听力原文：M: Will that be cash or charge? W: I want to pay by check if I may. M: Certainly. That's cash, then. W: Cash? M: Yes, Both money and checks are considered cash. Only credit cards are charge. W: O...
A.
To help the woman make a purchase.
B.
To request the woman’s identification.
C.
To show the woman for a course at City College.
D.
To register the woman how to make out a check.
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