—What are you doing, Lisa? Why not turn off the light? It’s time to sleep.
—I want to read for a while.
A.put off B.take off C.switch off
九年级英语单选题中等难度题
—What are you doing, Lisa? Why not turn off the light? It’s time to sleep.
—I want to read for a while.
A.put off B.take off C.switch off
九年级英语单选题中等难度题查看答案及解析
It’s dark in the room. Why not ______ the light?
A. turn up B. turn off C. turn on
九年级英语单选题中等难度题查看答案及解析
It is sunny outside. Why not ________ the light and open the window?
A. put off B. put away
C. turn up D. turn off
九年级英语单项填空中等难度题查看答案及解析
What did the woman want the man to do?
A. Turn on the light. B. Turn down the light. C. Turn off the light.
九年级英语听短对话回答问题中等难度题查看答案及解析
The reason why _________turns off the lights in the classroom is that we always think others will do it.
A. everybody B. nobody C. anybody D. somebody
九年级英语单选题中等难度题查看答案及解析
---What are you reading, Tom?
--- I’m not really reading, just _____ the pages.
A. turning off B. turning around C. turning over D. turning up
九年级英语单选题中等难度题查看答案及解析
－______ do you turn off the lights when you leave home?
－Nearly always.
A. How soon B. How often
C. How much D. How long
九年级英语单项填空中等难度题查看答案及解析
－______ do you turn off the lights when you leave home?
－Nearly always.
A. How soon B. How often C. How much D. How long
九年级英语单项填空中等难度题查看答案及解析
If we are driving a car or crossing a street, we will stop when the traffic lights turn red. Why do we use red rather than other colors?
As we know, scattering (散射) happens when light goes through the air. For the same media, if the wavelength (波长) is long, the scattering will be short. If the wavelength is short, then the scattering will be long.
Of all light 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 see the lights. It helps drivers slow down or stop in time. 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 light helps drivers stop in time and help prevent accidents.
1.______ has the longest wavelength of all light we can see.
A. Red B. Green C. Yellow D. Black
2.Red light travels farther on ______ days.
A. windy B. sunny C. rainy D. cloudy
3.Red can make people act more quickly because ____________.
A. red can make people happier B. the scattering of red is very short
C. the scattering of red is very long D. red can make people more excited
4.The underlined word “prevent” means ______ in Chinese.
A.逃避 B. 防止 C. 处理 D. 检查
5.The passage mainly tells us ____________.
A. why accidents happen B. how the red light travels
C. why we use red traffic lights D. how to stop in time at traffic lights
九年级英语阅读理解中等难度题查看答案及解析
If we are driving a car or crossing a street, we will stop when the traffic lights turn red. Why do we use red rather than other colors?
As we know, scattering (散射) happens when light goes through the air. For the same media, if the wavelength (波长) is long, the scattering will be short. If the wavelength is short, then the scattering will be long.
Of all light 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 see the lights. It helps drivers slow down or stop in time. 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 light helps drivers stop in time and help prevent accidents.
1.______ has the longest wavelength of all light we can see.
A. Red B. Green
C. Yellow D. Black
2.Red light travels farther on ______ days.
A. windy B. sunny
C. rainy D. cloudy
3.Red can make people act more quickly because ____________.
A. red can make people happier
B. the scattering of red is very short
C. the scattering of red is very long
D. red can make people more excited
4.The passage mainly tells us ____________.
A. why accidents happen
B. how the red light travels
C. why we use red traffic lights
D. how to stop in time at traffic lights
九年级英语阅读理解中等难度题查看答案及解析