A:Sorry, I don’t know.
B:I beg your pardon, sir?
C:What would you say?
D:Why not say again?
天气预报的制作过程的第二阶段是通过____和____计算,分析观测到的天气信息
如图,通电螺线管周围有甲、乙、丙、丁四个小磁针,静止后小磁针指向正确的是( )
—I'm not sure. Maybe five million.