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【单选题】
Which one is the correct etiquette ?
A.
Keep the mobile phone in power.
B.
Mute or turn off the mobile phone before the interview.
C.
If somebody calls you during the interview, you have to pick up the phone.
D.
You can play with your mobile phone in the interview.
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】若随机变量\(X\sim N(\mu,\sigma^2)\) ，则\(P\left\{\left|\dfrac{X-\mu}{\sigma}\right|\lt 1\right\}\)随\(\sigma\)的增大而
A.
增大
B.
减小
C.
不变
D.
条件不足，无法判断
