CHICAGO- Have you ever worked on your laptop computer with it sitting on your lap, heating up your legs? If so, you might want to rethink that habit from now on. Doing it a lot can lead to “toasted skin syndrome (症状)”, an unusual-looking spotted skin condition caused by long-term heat exposure (暴露), according to medical reports.
In one recent case, a 12-year-old boy from California developed a skin discoloration on his left lap after playing computer games a few hours every day for several months. “He recognized that the laptop got hot on the left side; however, he did not change its position,” Swiss researches reported in an article published Monday in the journal Pediatrics.
Another similar case is a Virginia law student who needed treatment for the spotted darkening on her leg. Dr. Kimberley Salkey, who treated the young woman, learned the student spent about six hours a day working with her computer placed on her lap. As Dr. Salkey later learnt, the temperature under the laptop could reach 51 degrees. That case, from 2007, is one of 10 laptop-related cases reported in medical journals in the past six years.
The condition can also be caused by overuse of heating pads (垫子) and other heat sources that usually aren’t hot enough to cause burns. It’s generally harmless but can also cause such permanent (永久的) skin darkening. In very rare cases, it can cause damage leading to skin cancers, said the Swiss researchers, Drs. Andreas Arnold and Peter Itin from University Hospital Basel. They do not mention any skin cancer cases linked to laptop use, but suggest, to be safe, placing a carrying case under the laptop if you have to hold it on your lap.
Dr. Kimberley Salkey said that under the microscope, the affected skin is similar to skin damaged by long-term sun exposure.
Major producers including Apple and Dell warn against placing laptops on laps or exposed skin for long periods of time because of the risks for burns. In the past, “toasted skin syndrome” has happened to workers whose jobs require being close to a heat source, including bakers and glass blowers, and in people who gathered near hot stoves to stay warm.
Dr. Anthony J. Mancini, chief at Children’s Memorial Hospital in Chicago, said that it’s unlikely that computer use would lead to cancer since it’s so easy to avoid close skin contact (接触) with laptops.
1.According to the passage, “toasted skin syndrome” can be caused by all the following EXCEPT ______.
A. being close to a heat source or hot stoves B. long period of direct contact to hot laptop
C. using one’s laptop with a carrying case D. overuse of heating pad and other heat sources
2.The underlined word “discoloration” in the 2nd paragraph refers to ______.
A. spot B. darkening C. sunburn D. heat
3.It can be learnt from the passage that laptop users ______.
A. should avoid close skin contact with laptops
B. are likely to develop a certain kind of cancer
C. have known much about the harm of laptop heating
D. should go to see the doctor at once
4.Some computer producers warn against placing laptops on laps for long periods of time because of ______.
A. the risk for burns B. the risk of dropping
C. the risk of breaking D. the protection of back bone
5.Which of the following might be the best title of the passage? ______.
A. Laptop is Dangerous B. Skin Damage is Possible
C. A Bad Habit D. No laps for Warm Laptops
九年级英语阅读理解困难题
CHICAGO- Have you ever worked on your laptop computer with it sitting on your lap, heating up your legs? If so, you might want to rethink that habit from now on. Doing it a lot can lead to “toasted skin syndrome (症状)”, an unusual-looking spotted skin condition caused by long-term heat exposure (暴露), according to medical reports.
In one recent case, a 12-year-old boy from California developed a skin discoloration on his left lap after playing computer games a few hours every day for several months. “He recognized that the laptop got hot on the left side; however, he did not change its position,” Swiss researches reported in an article published Monday in the journal Pediatrics.
Another similar case is a Virginia law student who needed treatment for the spotted darkening on her leg. Dr. Kimberley Salkey, who treated the young woman, learned the student spent about six hours a day working with her computer placed on her lap. As Dr. Salkey later learnt, the temperature under the laptop could reach 51 degrees. That case, from 2007, is one of 10 laptop-related cases reported in medical journals in the past six years.
The condition can also be caused by overuse of heating pads (垫子) and other heat sources that usually aren’t hot enough to cause burns. It’s generally harmless but can also cause such permanent (永久的) skin darkening. In very rare cases, it can cause damage leading to skin cancers, said the Swiss researchers, Drs. Andreas Arnold and Peter Itin from University Hospital Basel. They do not mention any skin cancer cases linked to laptop use, but suggest, to be safe, placing a carrying case under the laptop if you have to hold it on your lap.
Dr. Kimberley Salkey said that under the microscope, the affected skin is similar to skin damaged by long-term sun exposure.
Major producers including Apple and Dell warn against placing laptops on laps or exposed skin for long periods of time because of the risks for burns. In the past, “toasted skin syndrome” has happened to workers whose jobs require being close to a heat source, including bakers and glass blowers, and in people who gathered near hot stoves to stay warm.
Dr. Anthony J. Mancini, chief at Children’s Memorial Hospital in Chicago, said that it’s unlikely that computer use would lead to cancer since it’s so easy to avoid close skin contact (接触) with laptops.
1.According to the passage, “toasted skin syndrome” can be caused by all the following EXCEPT ______.
A. being close to a heat source or hot stoves B. long period of direct contact to hot laptop
C. using one’s laptop with a carrying case D. overuse of heating pad and other heat sources
2.The underlined word “discoloration” in the 2nd paragraph refers to ______.
A. spot B. darkening C. sunburn D. heat
3.It can be learnt from the passage that laptop users ______.
A. should avoid close skin contact with laptops
B. are likely to develop a certain kind of cancer
C. have known much about the harm of laptop heating
D. should go to see the doctor at once
4.Some computer producers warn against placing laptops on laps for long periods of time because of ______.
A. the risk for burns B. the risk of dropping
C. the risk of breaking D. the protection of back bone
5.Which of the following might be the best title of the passage? ______.
A. Laptop is Dangerous B. Skin Damage is Possible
C. A Bad Habit D. No laps for Warm Laptops
九年级英语阅读理解困难题查看答案及解析
Have you ever heard of e-waste, which can be produced every day? How do you deal with your computers, MP4 players and mobile phones when they’re broken or you want a new one?
Most people just throw them away. With the development of electric industry, e-waste pollution has become a serious problem. According to the United Nations, in 2014, people around the world produced 41.8 million tons of e-waste and only recycled 6.5 million tons. The US was the biggest waster, producing 7.1 million tons. China came second, with 6 million tons.
It’s important to pay attention to e-waste. It can either be valuable or harmful, depending on how we deal with it. E-waste is a valuable urban mine. The value of the metals, like gold and silver in the waste around the world, is amazing. And the metals can be reused. But if people throw them away, the toxic chemicals can get into the earth or air, effecting the environment and people’s health.
Apple, for example, now recycle people’s used products in China when they are buying new ones. The company will test and repair the used ones and sell them at lower prices. To help reduce e-waste, we can also take computers and phones to see if companies offer recycling programs.
1.How many tons did the people around the world produce e-waste in 2014?
A. 6.15 million tons B. 7.1 million tons
C. 41.8 million tons D. 6 million tons
2.The following can become e-waste EXCEPT ______.
A. textbooks B. mobile phones
C. MP4 players D. computers
3.If people throw the metals away, the toxic chemicals can get into the earth or air, it will be ______ to people’s heath.
A. good B. helpful
C. valuable D. harmful
4.Which statement is TRUE according to Paragraph 4?
A. the recycle Apple products will be sold at higher prices.
B. Some companies offer to recycle the used electronic products.
C. it’s better to keep the unwanted electronics in your bedroom.
D. buying longer lasting electronic products is a good way to reduce e-waste
5.The main purpose of this passage is to ______.
A. advise people to deal with e-waste properly to reduce pollution.
B. encourage people to buy more electronic products.
C We should throw away the broken electronic products.
D. prove that e-waste is useless.
九年级英语阅读理解中等难度题查看答案及解析
Have you ever heard of e-waste, which can be produced every day? How do you deal with your computers, MP4 players and mobile phones when they’re broken or you want a new one?
Most people just throw them away. With the development of electric industry, e-waste pollution has become a serious problem. According to the United Nations, in 2014, people around the world produced 41.8 million tons of e-waste and only recycled 6.5 million tons. The US was the biggest waster, producing 7.1 million tons. China came second, with 6 million tons.
It’s important to pay attention to e-waste. It can either be valuable or harmful, depending on how we deal with it. E-waste is a valuable urban mine(城市矿藏). The value of the metals, like gold and silver in the waste around the world, is amazing. And the metals can be reused. But if people throw them away, the toxic(有毒的)chemicals can get into the earth or air, affecting the environment and people’s health.
Apple, for example, now recycle people’s used products in China when they are buying new ones. The company will test and repair the used ones and sell them at lower prices. To help reduce e-waste, we can also take computers and phones to see if companies offer recycling programs.
1.The following can become e-waste EXCEPT_____.
A. computers B. mobile phones C. plastic bags D. MP4 players
2.Which country produced most e-waste last year according to the United Nations?
A. America. B. China. C. Japan. D. the UK
3.What does the underline word “affecting” mean in this passage?
A. protecting B. influencing C. improving D. changing
4.From Paragraph 4, we learn that_____.
A. the recycle Apple products will be sold at higher prices.
B. buying longer lasting electronic products is a good way to reduce e-waste.
C. it’s better to keep the unwanted electronics in your bedroom.
D. Used electric products can’t be recycled.
5.The main purpose of this passage is to_____.
A. prove that e-waste is useless.
B. encourage people to buy more electronic products.
C. advise people to deal with e-waste properly to reduce pollution.
D. talk about the value of e-waste.
九年级英语阅读理解极难题查看答案及解析
Although you have lots of difficulties, you must _______your work.
A.carry on with B. carry out with C. carry away on D. carry over
九年级英语单项填空中等难度题查看答案及解析
Although you have lots of difficulties, you must your work.
A. carry out with B. carry away on C. carry on with D. carry on
九年级英语单项填空简单题查看答案及解析
Although you have lots of difficulties, you must ______your work.
A. carry out with B. carry away on C. carry on with D. carry over
九年级英语单选题简单题查看答案及解析
Although you have lots of difficulties, you must ______your work.
A.carry out with | B.carry away on | C.carry on with | D.carry over |
九年级英语单项填空困难题查看答案及解析
--- How are you getting on with your work?
--- I can’t do it __________ any longer. I will have to get help.
A. carefully B. quietly C. alone D. hard
九年级英语单项填空中等难度题查看答案及解析
How are you getting on with your work?
—I can’t do it ________ any longer. I’ll have to get help.
A. carefully B. quietly C. alone D. hard
九年级英语单项填空困难题查看答案及解析
一May I use your computer? 一Sorry. I ________ on it.
A. work B. have worked C. am working
九年级英语单选题中等难度题查看答案及解析