The first main point the speaker talks about is ________.
A. what personality means
B. when a person’s personality starts to develops
C. how to express one’s personality
D. how to solve personality problems
People can be roughly put into ________.
A. 5 categories
B. 4 categories
C. 3 categories
D. 2 categories
With the aid of knowledge about personality, we can ________.
A. provide more help to each other
B. conduct some research on our own
C. improve our relationship with others
D. have better communication with others
集成运放的输入级：要求输入电阻（），能够抑制零点漂移和干扰信号。
A. 高
B. 低
C. 任意
D. 不确定
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