激光也是电磁波,属于()辐射,被广泛用于工业、农业、国防、医疗和科研等领域。
参考答案:非电离
Everyone of us _____ it’s important _____a seat belt in the car.
A.knows, wears
B.know, to wear
C.knows, to wear
D.know, wearing
车辆转弯时,驾驶员主要考虑那种稳定性()。
A、横向稳定性
B、纵向稳定性