反吹测量系统一般用于什么场合？
参考答案：
被测介质脏，浓等易造成取压管堵塞的地方.
—I'd like to go there with you.
—That's very kind ______ you. OK, Let's go.[ ]
A. for
B. on
C. of
D. in
用什么方法可以鉴定一群体是纯种还是杂种？
