下列关于南极洲的叙述中,正确的是[ ]
A.矿产资源贫乏
B.终年盛行东北风
C.淡水资源储量丰富
D.平均海拔低于亚洲
答案:C
肾盂切开取石术后,下列关于肾盂造口管的护理中哪项不妥
A.导管低压冲洗,每次5ml
B.导管留置10d以上
C.拔管前1d应夹管观察
D.拔管前做肾盂造影
E.拔管后向患侧卧位
It was_______he came backfrom Africa that year_______he met the girl he would like to marry. [ ]
A. when ; then
B. not ; until
C. not until ; that
D. only ; when