单项选择题

系统的特征方程,可以判断系统为( )。 A.
稳定 B.
不稳定 C.
临界稳定 D.
稳定性不确定

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(1) is a language used in a body of texts dealing with a circumscribed subject area ... in which the authors of the documents share a common vocabulary and common habits of word usage.

答案：填空(1)： Sublanguages 。

不定项选择

It is okay to mention some detailed information about the company or organization at the beginning of an application letter for employment in order to capture the interest of the addressee.

A．错误
B．正确