泵出口设置止逆阀的作用是()。
参考答案:防止停泵后液体倒流入泵内损坏叶轮
下列情况下新生儿颅内出血的预后较差,但除外()
A.蛛网膜下隙少量出血
B.早产儿颅内出血
C.生后20分钟Apgar评分过低的新生儿颅内出血
D.大量脑室内出血且伴脑室扩大
E.极低体重儿的颅内出血
---It is known to all that this factory pours lots of waste water into the Changjiang River every year.
---- _________ near my hometown.
A.So does it
B.So it is
C.So the one does
D.So does the one