在OSSMO中，以下与B文件数据有关的操作有________。
A．定时观测
B．天气报
C．SAWSS的运行
D．逐日地面数据维护
参考答案：A,B,D
It is reported that many a new house _____ at present in the disaster area. [ ]
A. are being built
B. were being built
C. was being built
D. is being built
在国内运输中，已知一票货物声明价值为6000元，货物实际重量为80公斤，货物声明价值附加费为（）元。
A、22
B、30
C、44
D、60
