—Look at the flowers I gave you last month. They are dying! ________ do you water them?

—Sorry, I forgot to water them.

A．How long

B．How often

C．How soon

D．How much

有关石棉肺病理改变，不正确的是（）

A.以肺间质弥漫性胶原纤维增生为主要特征

B.胸膜受累较常见

C.组织切片或痰液中可检出其独有的含铁小体

D.病变后期大体肺切面可见灰白色纤维化索条和网架

E.胸膜斑的大小和数量与肺内纤维化病变可不一致