肺痈的诊断有验痰法，吐痰与水中，沉者是

A．肺阴虚
B．咳嗽、咳血、潮热、盗汗
C．咳吐、浊唾涎沫
D．肺阴亏损
E．肺痿

In reading a weather map, closely spaced pressure gradient lines would indicate（）.

A.high winds

B.high overcast clouds

C.calm or light winds

D.fog or steady rain