It moves at a speed of 300,000 kilometers a second. Light reaches us from the moon in less than a second and a half. The moon is about 382,000 kilometers away. Light from the sun reaches us in 8.5 minutes. The sun is about 149,840,000 kilometers from the earth. The other ...
It moves at a speed(速度) of 300,000 kilometers(千米) a second. Light reaches(= gets to)us from the moon in less than asecond and a half. The moon is almost 382,000 kilometers away. The sun isabout 149,840,000 kilometers away from the earth. The other stars are fartheraway ...
【题文】 Light travels at a speed which is about a million times faster than the speed of sound. In one second, light travels about 300,000 km, but sound travels only 344m. You can get some idea of this difference by watching the start of a race. If you stand some distance away ...
the sound of the gun reached you at the same time with the light of the smoke 3.Sunlight obviously (明显的) ___ than the light of the moon. [ ] . has to travel a greater distance (距离) . moves less quickly . travels much more quickly . is less powerful 4.The scientific way of...
1.由第一段的Light travels at a speed which is about a million times faster than the speed of sound.可知答案。2.由第一段的If you stand some distance away from the starter, you can see smoke from his gun before the sound reaches your ears.可知答案。3.由第二段的Sunlight takes about 8...
【题目】阅读理解Light travels at a speed(速度) which is about a million times faster than that of sound. In one second, light travels about 300,000kilometers, but sound travels only 340 meters.You can get some idea of this difference by watching the start of a running match. If you...
根据原文Light travels at a speed which is about a million times faster than the speed of sound可知,光的传播速度大约是声速的一百万倍。故选D。 (2)题详解: 细节理解题。根据原文If you stand some distance away from the starter, you can see smoke from his gun before the sound reaches your ...
光本文描述了光的传播速度以及它在各个星体之间传播所需的不同时间。Light travels very fast. It moves at a speed of300,00
根据Light travels at a speed which is about a million times faster than the speed of sound.光的传播速度大约是声速的一百万倍。可知,光速大约是音速的一百万倍。故选D。(2)B.推理判断题。根据If you stand some distance away from the starter,you can see smoke from his gun before the sound ...
【题目】Light travels at a speed which is about a million times faster than the speed of sound. In one second, light travels about 300,000 km, but sound travelsonly 344m. You can get some idea of this differenceby watching the start of a race. If you stand some distance away from ...