Never c_______(横穿) the street when the red light is on.
九年级英语根据中/英文提示填空中等难度题
Never c_______(横穿) the street when the red light is on.
九年级英语根据中/英文提示填空中等难度题查看答案及解析
When the traffic lights turn red, we will stop driving a car or crossing a street. Why is red used for traffic lights instead of other colors?
As we know, scattering (散射) happens when light goes through the air. For the same media(媒质), if the wavelength is long, the scattering will be short. If the wavelength is short, then the scattering will be long.
Of all lights we can see red has the longest wavelength, so the scattering is the weakest. That means the red light travels far. In fact, it travels farther on rainy days.
Using the red light can help drivers in farther areas sec the lights. It helps drivers stow down or stop in lime. If drivers don't see the red light until they are close, they may not be able to stop the car in time. An accident may happen Red can also excite people. We can act more quickly when we see the color red. In a word, red lights help drivers stop in time and help prevent accidents.
1. When the traffic lights turn ______, we will stop driving a car.
A. red B green C. yellow
2.According to the passage, the scattering of the red light is the _______.
A. longest b. weakest C. farthest
3. The underlined word "wavelength" means________ in Chinese.
A.波浪 B.光波 C.波长
4. What can the red light help drivers do?
A. It can help drivers in farther areas see the lights.
b. It can help drivers slow down or stop in time.
C. A and b
5.Which of the following is the best title?
A. Why do accidents happen
b. How does the red light travel
C. Why do we use red traffic lights
九年级英语阅读理解中等难度题查看答案及解析
It’s very dangerous to go ________(穿过) the street when the traffic light is red.
九年级英语根据中/英文提示填空中等难度题查看答案及解析
Be careful! The traffic light is red. Don't go ________ the street now.
A.on B.in C.along D.across
九年级英语单选题中等难度题查看答案及解析
We should _______ people from crossing the road when the red light is on. Which of the following choices is wrong?
A.protect B.stop C.keep D.promise
九年级英语单选题中等难度题查看答案及解析
You _________ drive on when the traffic light is red.
A. can’t B. needn’t
C. mustn’t D. may not
九年级英语单项填空简单题查看答案及解析
The policeman told us the street when the traffic light was red.
A. not cross B. didn’t cross C. not to cross D. not crossing
九年级英语单项填空简单题查看答案及解析
（2017 • 吉林省中考）You cross the street when the traffic lights are red.
A. needn’t B. don’t have to C. mustn’t
九年级英语单选题中等难度题查看答案及解析
The policeman told us __________ the street when the traffic light was red.
A. not cross B. didn’t cross
C. not crossing D. not to cross
九年级英语单项填空简单题查看答案及解析
The policeman told us __________ the street when the traffic light was red.
A. not cross B. didn’t cross C. not crossing D. not to cross
九年级英语单项填空中等难度题查看答案及解析