Unit 7 To Your Good Health教學(xué)案
light travels so fast that the time in which it travels from the book you are reading to your eyes is so short as if there were no time at all. light reaches us from the moon, which is about 380, 000 kilometers away, in only a little more than a second.
32. you can see the book because .
a. your eyes are close to it
b. it reflects some of the sunlight
c. it has light of its own
d. your eyesight can get to it
33. the underlined word “l(fā)uminous” means .
a. visible b. all colours
c. giving off light d. sunlight
34. have light of their own.
a. the sun and the moon b. the stars and the earth
c. the sun and the stars d. the moon and the earth
35. which of the following is true?
a. all the things you can see give off light.
b. light from the book is much shorter than that from the moon.
c. the moment you open your eyes the light from the book travels to your eyes.
d. light travels so fast that there is no time for you to read.
【試題答案】
1－5 dcbad 6－10 abcdb 11－15 cacac 16－20 accbc 21－25 bbaba
26－30 bdbac 31－35 bbccc