【多选题】在利用实测流量资料推求设计流量时,需要对资料进行“三性”审查,包括:
【单选题】关于光速,下列说法不正确的是( )
B.
光的传播速度最大值为3.0×l0 8 m/s
【简答题】We were most________by your efficiency. (impress)
【单选题】下列关于电磁波的传播速度的叙述中,正确的是( )
D.
只有可见光在真空中的传播速度是3×10 8 m/s
【简答题】单词拼写 1.The teacher tells us the harder we work, the ________(幸福) we feel. 2.All things ________ (考虑), I think we ought to give the job to George. 3.Since no one is ________(反对) it, we'll adopt the pro...