多项选择题

能力具有哪些特点？

A．经常性
B．不经常性
C．稳定性
D．不稳定性

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Directions: Read the following sentences and fill in the missing word or phrase.
afraid doubt completely same out of
point problem sounds would be honest
4. Don't you think it_____ better to give the contract to Samsons and not Ptech?

答案： would be

单项选择题

设随机变量X服从(a，b)上的均匀分布，则
A、正确
B、错误