轿厢应安装有自动再充电的紧急电源,在正常照明的电源被中断的情况下,它能至少供1W灯泡用电()
A.30分钟
B.40分钟
C.1小时
D.2小时
参考答案:C
肾足少阴之脉“气不足”可出现的症状是()
A.狂
B.心惕惕如人将捕之
C.癫疾
D.喜笑不休
E.善悲
Yesterday I _______ an old friend of mine at the shopping mall.
A.came up
B.came out
C.came across
D.came down