北魏时,洛阳的繁华体现在
①巍峨的宫殿,华丽的屋宇②大量的佛教寺院③人口达100多万④很大的市场和云集的商人[ ]
A.①②③
B.②③④
C.①②④
D.①②③④
答案:C
如该患儿在脱水纠正后出现惊厥,首先要考虑的诊断是
A.低钾血症
B.低钙血症
C.低镁血症
D.血液低渗
E.脑水肿
-- Is Sally in the classroom?
-- No. There _____ nobody in it.[ ]
A. is
B. are
C. has