微波技术中
参考答案：
静磁场方向与波的传播方向相垂直的磁化。
If you first aid correctly, the man would have not hurt that much. [ ]
A. had done
B. have given
C. did
D. gave
车辆超载时轮胎的损坏与在低压下行驶的损坏相似，轮胎超载，接地面积（），磨损加剧，遇障碍物受到冲击，易引起胎冠爆破。
A、减小
B、增大
C、不变
