“请指出下面各句话中的影”,说明了光在传播过程中所遵从的哪一个物理规律?
手影________;
水中倒影________;
杯弓蛇影________。
光沿直线传播;光的反射;光的折射
The purpose for the bag or box on top of some survival craft is to().
A.right the craft in case of capsizing
B.increase area for radar detection
C.act as a sail in case of a power loss
D.steady the craft in heavy seas
炉缸内燃烧产生大量的CO2。()