人在高温的环境中胸闷、体温38℃以上,脉搏快而细弱,面色苍白,血压下降、晕厥、甚至昏迷,提示其()
A.先兆中暑
B.轻症中暑
C.中度中暑
D.重症中暑
E.休克
参考答案:D
—There's a(n) ______ on the board saying that there will be an English speech contest next week.
—That's great. It is a good chance for us to improve our oral English.[ ]
A. advertisement
B. advice
C. letter
D. notice
在地面如何打开前起落架舱门?
A、在前轮舱拉动舱门上锁释放钢索
B、断开机械连杆
C、不能打开