单项选择题

利用p值检验法对正态总体的数学期望
A、可能接受也可能拒绝
B、一定接受
C、一定拒绝
D、无法判断

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不定项选择

为消除系统稳态误差，可适当加入积分控制。‌

A．正确
B．错误

多项选择题

Choose the expression that has the similar meaning to the underlined part.
Until then, most scientists were of the opinion that these variations in weather were compatible with established climate patterns.
A、took the view
B、believed
C、had the opinion
D、held the opinion