单项选择题

一般情况下，礼节性拜访停留时间以多长为宜，亲朋好友以多长为宜（） A.
10分钟，20分钟 B.
10分钟，30分钟 C.
20分钟，30分钟 D.
10分钟，10分钟

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What should you do during the interview?
A、 Put all of your materials in a professional-looking folder, briefcase, or handbag.
B、 Practice your interview with someone you trust. Rehearse your responses out loud.
C、 Make occasional eye contact for at least 5 seconds throughout the interview.
D、 Research information about the company including their “mission” or goal.

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可以使用电压比较器转换模拟量为开关量

A．对
B．错