残余尿量保持在多少以下可减少泌尿系感染的发生?()
A.80~100ml
B.100~120ml
C.100~150ml
D.120~150ml
E.100~200ml
参考答案:A
下列句中的“为”字,用作语气词的一项是( )
A 譬如为山,未成一篑,止,吾止也
B 温故而知新,可以为师矣
C 天之亡我,我何渡为
D 不足为外人道也
Nicolaus Copernicus’ discovery about the universe is ______, which ______later achievements in astronomy science. [ ]
A. ambitious; gave birth to
B. enthusiastic; resulted in
C. obvious; resulted in
D. revolutionary; led to