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【单选题】
下列关于水磁悬液的制作,正确的是:A.
把磁粉很快投入大量水中，然后仔细搅拌
B.
先把磁粉和少量水搅拌，然后稀释
C.
先把磁粉用表面活性剂仔细搅拌，再用水冲淡，分散的水中
D.
在荧光磁粉中加入表面活性剂，放进研钵，仔细研磨后再分散的水中
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举一反三
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【单选题】According to the writer, most Mexicans don't have time to socialize with family and friends.
A.
True
B.
False
C.
Not given
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A.
社会
B.
社交
C.
遇到
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【简答题】A．recognize B．realize C．authorize D．socialize
【单选题】According to the writer, most Mexicans don’t have time to socialize with family and friends.
A.
T
B.
F
C.
NG
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