多项选择题 ‍离心泵的控制方案有‎

问答题 There are four maxims in CP: maxim of [填空1], maxim of [填空2], maxim of[填空3], and maxim of [填空4]. The first maxim makes sure what we say is as informative as required, the second means we do not say what we believe to be false, the third means what we say is relevant to the topic and the last means that we express ideas in a clear and orderly manner.

单项选择题 柳梦梅属于哪个行当？ A、 大官生 B、 穷生 C、 娃娃生 D、 巾生