在三投影面体系中,水平面()于侧立投影面、()于正立投影面、()于水平投影面。
参考答案:垂直;垂直;平行
---- We can give you a ride into town.
---- ________ Thank you.
A.Yes, please.
B.Yes, why not?
C.Oh, that would be great.
D.Oh, it would be my pleasure.
新生儿败血症最多见的感染途径是()
A.胎内感染
B.产道感染
C.脐部感染
D.暖箱
E.雾化器