门静脉高压症最危险的并发症是
A.肝性脑病B.血小板减少C.顽固性腹水D.充血性脾肿大E.食管、胃底曲张静脉破裂大出血
参考答案:E
如果每人节约1元钱,全国13亿人就节约______元钱;如果救助一个受灾家庭需要5000元,那么这些钱可以救助______万个受灾家庭.
All the guests at the party were dancing and singing happily _____ the electricity was cut off.
A.until
B.while
C.when
D.because