单项选择题

在有机溶剂中，一般三氯甲烷对游离生物碱的溶解度较大
A、正确
B、错误

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单项选择题

Which statements about the United Nations are NOT correct?
A、It was established after the Second World War.
B、It’s a typical international organization possessing universal character.
C、It’s the first universal international organization.
D、It is now considered the most powerful and popular organization in the world community.

不定项选择

‍满意度高,顾客忠诚度就一定高。( )‎

A．正确
B．错误