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【多选题】
检查砷盐中,SnCl2的作用是( )A.
使As5+→As3+
B.
除去H2S
C.
使生成的I2→I-
D.
形成锌-锡齐
E.
除去其它杂质
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皮皮学刷刷变学霸
举一反三
【单选题】The best way to keep yourself from getting colds is___________
A.
to keep yourself clean
B.
to use a disinfectant soap
C.
to take two aspirin pills every day
D.
to drink lots of water
【单选题】—May I have another chocolate? —Yes, of course.___________. A. Take it yourself B. Eat it, please C. Help yourself D. Have it yourself
A.
Take it yourself
B.
Eat it, please
C.
Help yourself
D.
Have it yourself
【单选题】According to the text, the intake of fish in 1986 was related to the risk of subsequent coronary disease.
A.
Right
B.
Wrong
C.
Not mentioned
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