Often, the fact ________ unemployed people get help from government ________ this from happening, but not always.

A．how, to prevent

B．that, prevents

C． how, preventing

D．why, prevented

有关乳腺疾病，下列错误的是（）

A.慢性囊性乳腺病常为多发性病变

B.乳管内 * * 状瘤极少恶变

C. * * 纤维腺瘤虽属良性，也有恶变可能

D.急性乳腺炎患者几乎都是产妇

E. * * 内间质也可以发生恶性肿瘤