汽轮机按热力过程可分为凝汽式、背压式、调整抽汽式、中间再热式四大类，而干熄焦车间的汽轮机是（）式的。
参考答案：凝汽
介入治疗中，血管内给予罂粟碱的意义是（）
A.扩血管
B.抗肿瘤
C.缩血管、止血
D.溶栓
E.降低血液黏度
"Do you know ________ " "His father is a doctor."
A．what is his father
B．who is his father
C．what his father is
D．who his father is
