题目内容
The Cold Places The Arctic is a polar region. It surrounds the North Pole. Like Antarctica, the Arctic is a land of ice and snow. Antarctica holds the record for a low temperature reading—125 Fahrenheit below zero. Readings of 85 degrees below zero are common in both the Arctic and Antarctica. Winter temperatures average 30 degrees below zero in the Arctic. At the South Pole the winter is about 73 degrees below zero. One thing alone makes it almost impossible for men to Jive in Antarctica and in parts of the Arctic. This one thing is the low temperature—the killing chili of the far North and the polar South. To survive, men must wear the warmest possible clothing. They must build windproof shelters. They must keep heaters going at all times. Not even for moment can they be unprotected against the below-zero temperature. Men have a way of providing for themselves. Polar explorers wrap themselves in warm coats and furs. The cold makes life difficult. But the explorers can stay alive. What about animals Can they survive Do we find plants Do we find life in the Arctic and the Antarctica Yes, we do. There is life in the oceans. There is life on land. Antarctica, as we have seen, is a cold place indeed. But this has not always been the case. Expedition scientists have discovered that Antarctica may have been much like our own. Explores have discovered coal in Antarctica. This leads them to believe that Antarctica at one time was a land of swamps and forests. Heat and moisture must have kept the trees in the forests alive. Winter temperatures average 85 degrees below zero in Antarctica.
查看答案
搜索结果不匹配？点我反馈
更多问题
Even Intelligent People Can Fail1 The striking thing about the innovators who succeeded in making our modern world is how often they failed. Turn on a light, take a photograph, watch TV, search the Web, jet across the Pacific Ocean, talk on a cellphone (手机). The innovators who left us these things had to find the way to success through a maze (错综复杂) of wrong turns.2 We have just celebrated the 125th anniversary of American innovator Thomas Edison’s success in heating a thin line to white-hot heat for 14 hours in his lab in New Jersey, US. He did that on October 22, 1879, and followed up a month later by keeping a thread of common cardboard alight (点亮着的) in an airless space for 45 hours. Three years later he went on to light up half a square mile of downtown Manhattan, even though only one of the six power plants in his design worked when he turned it on, on September 4, 1882.3 "Many of life’s failures," the supreme innovator said, "are people who did not realize how close they were to success when they gave up." Before that magical moment in October 1879, Edison had worked out no fewer than 3,000 theories about electric light, but in only two cases did his experiments work.4 No one likes failure, but the smart innovators learn from it. Mark Gumz, the head of the camera maker Olympus America Inc, attributes some of the company’s successes in technology to understanding failure. His popular phrase is: "You only fail when you quit."5 Over two centuries, the most common quality of the innovators has been persistence. That is another way of saying they had the emotional ability to keep up what they were doing. Walt Disney, the founder of Disneyland, was so broke after a succession of financial failures that he was left shoeless in his office because he could not afford the US$1.50 to get his shoes from the repair shop. Pioneering car maker Henry Ford failed with one company and was forced out of another before he developed the Model T car.6 Failure is harder to bear in today’s open, accelerated world. Hardly any innovation works the first time. But an impatient society and the media want instant success. When American music and movie master David Geffen had a difficult time, a critic said nastily that the only difference between Geffen Records (Geffen’s company) and the Titanic (the ship that went down) was that the Titanic had better music. Actually, it wasn’t. After four years of losses, Geffen had so many hits (成功的作品) he could afford a ship as big as the Titanic all to himself. Paragraph 2______A. Importance of learning from failureB. Quality shared by most innovator-:C. Edison’s innovationD. Edison’s comment on failureE. Contributions made by innovatorsF. Miseries endured by innovators
脂溶性最低，进入脑组织最慢的是：
对HPLC法进行准确度考查时，回收率一般为
对容量分析法进行精密度考查时，平行试验5个样本，试验数据的相对标准差一般不应大于
微信支付 
支付宝支付