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因为你太累了，最好不要继续工作了。
__________________ go on with your work because you are too tired.
九年级英语补全对话困难题查看答案及解析
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Does your father go to work, _______ foot or _______ bike?
A. on; with B. with; on C. by; on D. on; by
九年级英语单选题中等难度题查看答案及解析
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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
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Don’t waste your time. You should ________ your work.
A. hang out B. look for
C. concentrate on D. go by
九年级英语单项填空中等难度题查看答案及解析
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Don’t waste your time. You should ________ your work.
A. hang out B. look for
C. concentrate on D. go by
九年级英语单项填空中等难度题查看答案及解析
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It’s bad for your health to go to work ______ breakfast.
A. without B. at C. in D. with
九年级英语单项填空中等难度题查看答案及解析
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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
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If your dream is to live and work in rooms with amazing views, the office on the Alps must be your choice.The little hut, sitting 7,000 feet1.the ground, is on a mountain of the Alps in Switzerland, It was built to house the operator of a chairlift on the2.. Though in a high place, the office is a3.place to work. What’s more, the office Is quite small for it hold one person in it. The office, with its special location, provides a good place to enjoy the view of the Alps. However, the hut itself is also a 4.attraction. When fog surrounds the mountains, the hut seems as if it is floating in the air. How amazing!
九年级英语选词填空中等难度题查看答案及解析
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— How is it going with your new project?
— After a _______ working, we have finished _______ of the whole work.
A. four – day, three – fourth
B. four hours, three – fourths
C. four – day, three – fourths
D. four hours’, three – four
九年级英语单项填空中等难度题查看答案及解析
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If you keep working with your courage(勇气) and belief, you can reach the stage(舞台) on which you can show all your _____.
A. furniture B. talents C. collections
九年级英语单选题中等难度题查看答案及解析
