在电磁波谱中,有无线电波、红外线、可见光、紫外线、X射线和γ射线等,其中,波长最长的是____,频率最高的电磁波在真空中传播的速度为____ m/s.
—____ —He is a teacher.
—How about _______ in the river with us?
—Sorry, I can't. My parents often tell me _______ that.
110÷57= 14