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【多选题】

which of the following statement about hearing and listening are incorrect?

A.
Listening is only an automatic reaction of the sense and nervous system.
B.
Hearing is the “receiving” part of the communication process.
C.
Listening is a biological reaction
D.
Listening is a more complicated process of understanding what was said.
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参考解析:
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举一反三

【单选题】醇、酚羟基的酰基保护,常用的是

A.
甲酰化保护
B.
乙酰化保护
C.
苯甲酰化保护
D.
以上都是

【单选题】增大B/d,横稳心半径(),横摇周期(),稳性变()。

A.
增加 增加 差
B.
增加 减小 差
C.
减小 增加 差
D.
增加 减小 好