消防员呼救器允许静止时间:30s±5s ,预报警时间()
参考答案:15s±3s
麻子仁丸的主治证候中有()
A.大便稀溏
B.腰膝酸软
C.小便频数
D.久痢赤白
E.手足厥逆
— How about your journey to Mount Emei?
— Everything was wonderful except that our car _____ twice on the way. [ ]
A. slowed down
B. broke down
C. got down
D. put down