Don't make any noise, I'm the radio. [ ]
A.listen to
B.listening to
C.hear
D.hearing
答案:B
女,40岁,进行性经期腹痛半年,伴月经量增多,应考虑()
A.子宫肌瘤
B.颗粒细胞瘤
C.子宫肉瘤
D.子宫内膜异位症
E.子宫腺肌病
双逆流和混合流布置的换热器有何特点?