—Do you know sound travels very fast?一Yes. Bu...

---Do you know sound travels very fast?

----Yes. But light travels _______ sound.

A. as fast as　　 　　　 　 B. more faster than

C. much faster than　　 D. slower than

九年级英语单项填空中等难度题查看答案及解析

—Do you know sound travels very fast?

—Yes. But light travels ________ sound.

A.as fast as B.a little faster than

C.much faster than D.slower than

九年级英语单选题中等难度题查看答案及解析

— Do you know sound travels very fast?

— Yes. But light travels ________ sound.

九年级英语单项填空中等难度题查看答案及解析

—Do you know sound travels very fast?

—Yes. But light travels ________ sound.

A. as fast as　　 B. a little faster than

C. much faster than　　 D. slower than

九年级英语单选题中等难度题查看答案及解析

—Do you know sound travels very fast?

一Yes. But light travels _________ sound.

A. much faster than　　 B. a little faster than

C. as fast as　　 D. slower than

九年级英语单项填空中等难度题查看答案及解析

— Generally speaking, light ___ faster than sound.　　　 — Yes, it is a rule.

A. flies　　　　 　　　 B. spreads

C. travels　　　　　　 D. walks

九年级英语单项填空简单题查看答案及解析

Light travels at a speed which is about a million times faster than the speed of sound. You can get some idea of this difference by watching the start of a race. If you stand some distance(距离) away from the starter, you can see smoke from his gun before the sound reaches your ears.

This great speed of light produces some strange facts. Sunlight(太阳光) takes about 8 minutes to reach us. If you look at the light of the moon tonight, remember that the light rays left the moon 1.3 seconds before they reached you. The nearest star is so far away that the light that you can see from it tonight started to travel towards you four years ago at a speed of nearly 2 million km. per minute. In some cases, the light from one of tonight’s stars had started on its journey to you before you were born.

Thus, if we want to be honest, we can’t say, “The stars are shining tonight.” We have to say instead, “The stars look pretty. They were shining four years ago, but their light has only just reached the earth.”

1.Light speed is ______ sound speed.

A. as fast as

B. a million times slower than

C. about millions of times faster than

D. about a million times faster than

2. If you stand 200 meters away from a man who is firing a gun to start a race, you will find out that ______.

A. you can hear the sound before you see the smoke

B. the sound does not travel as fast as light

C. the sound will reach you before the man fires

D. sound travels about a million times faster than light

3.Sunlight obviously(显然的) ______ than the light of the moon.

A. has to travel a greater distance

B. moves less quickly

C. travels much more quickly

D. is less powerful

4. The scientific way of saying "The stars are shining tonight" should be ______.

A. the stars have been shining all the time

B. the stars seen tonight will shine four years later

C. the stars were shining long ago but seen tonight

D. the starlight seen today could be seen four years ago

九年级英语阅读理解中等难度题查看答案及解析

--- Do you know Cindy was famous at_______ very young age.

--- Yes. But she died young. She died at_______ age of 33.

A. a; an       B. a; the                C. the; the             D. the; an

九年级英语单项填空中等难度题查看答案及解析

— Do you know when the light rail S7 ____________?

— Next year. Traveling to Nanjing will take much less time when it __________.

A. will complete; complete　　 B. will be completed; is completed

C. will be completed; will be completed　　 D. is completed; will be completed

九年级英语单选题简单题查看答案及解析

The teacher told us _________.

A. light travelled as fast as sound

B. light travelled faster than sound

C. light travels as fast as sound

D. light travels faster than sound

九年级英语单项填空中等难度题查看答案及解析