【单选题】限制环境中的有害物质和因素以满足环境达到规定使用功能和生态环境质量基本要求的环境标准是( )。
【单选题】Which of the following statements is true about VHF? ____
A.
The VHF is used to bridge short distances. VHF
B.
With VHF, listening and speaking can be done simultaneously.
C.
When you wish to speak, you release the button.
D.
When you wish to listen, you push the button.
【单选题】Which of the following statements is NOT true?
A.
When they were climbing the mountain, two of them fell into the valley.
B.
The firemen arrived half an hour later.
C.
Mr. Zhang hurt his head..
D.
The accident happened on Mount Hua, Shanxi.
【单选题】Whicb of the following numbers indicates a ship station MMSI?
【单选题】限制环境中的有害物质和因素以满足环境达到规定使用功能和生态环境质量基本要求的环境标准是()。
【单选题】( )是满足环境达到规定使用功能和生态环境质量的基本要求。
【多选题】一般心理问题的内涵有()。
A.
工作压力,处事失误等因素产生内心冲突,体验到不良情绪。
C.
基 本维持正常生活,学习,社会交往,但效率有所下降 。