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【单选题】
Passage OneQuestions 1 to 5 are based on the following passage.In late April, 33-year-old Li Yang climbed into her new car, Suzuki Alto and headed west. She “just kept going to see how far I could get.” Six days and 1,600 miles later, she arrived in Lhasa, the Tibetan capital. Exhausted and excited, she wrote an article and put it on the Internet, documenting her adventure with digital photos.For centuries such freedom of movement has been unimaginable in China. In feudal times, poverty, bad roads, and imperial edict confined people to the villages where they were born. Now all that is changing. With China’s economic development for decades, car ownership is suddenly within reach of millions of ordinary Chinese. As incomes rise, new car prices fall down quickly, and the government adds new roadways, many Chinese people think that it is enjoyable to have their own cars instead of bicycles. The increasing number of cars has launched a new cultural revolution, transforming Chinese life and society in many ways, just like what happened in America 50 years ago. The most obvious change is the traffic. Beijing’s broad streets are now filled with cars at rush hour. In Shanghai the bridges and tunnels crossing the Huangpu River witness so many cars that a cab ride from one side to the other can take more than an hour. To prevent traffic jams, the Shanghai city government auctions a limited number of new car license plates each month. Even with these restrictions, the number of cars on Chinese roads is increasing so fast it poses a grave threat to the environment and could reshape the global economics of oil.Private cars have brought about a new class of commuters, who drive to downtown office towers from spacious, modern homes in the suburbs. “I enjoy the drive,” says the manager of a Dutch food company, who takes the 30-minute-trip to his office in the center of Shanghai. He lives with his wife and infant son in a gated community with a familiar name: Long Island. “It would be probably cheaper to take a taxi every day,” he said. “But this way, I feel more comfortable and have more freedom.”1. According to the passage, why did Li Yang put the article on the Internet?
A.
To document her adventure.
B.
To ask for help.
C.
To earn some compassion.
D.
To earn some compassion.
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举一反三
【判断题】在区间 上是无界的 .
A.
正确
B.
错误
【判断题】一个函数在某个区间上是无界的,那么它一定是无穷大。
A.
正确
B.
错误
【判断题】在闭区间上的连续函数是无界的。
A.
正确
B.
错误
【单选题】稽留热的特点是
A.
骤起高热,持续数日,高热重复出现
B.
24小时的体温相差超过l℃
C.
24小时内体温波动于高热与常温之下
D.
24小时的体温相差不超过l℃
E.
发热数日,退热1日,又再发热数日
【单选题】( )是大客户销售的目的
A.
赚取利润
B.
降低库存
C.
获取企业长期、持续的收益
D.
取得市场的竞争优势
【单选题】通常在DDC的I/O接口处模拟DI点的通断,观察其对应点()的变化来实现对DI点的测控。
A.
亮度值
B.
指示灯
C.
电压值
D.
电流值
【单选题】通常在DDC的I/O接口处模拟DI点的通断,观察其对应点{.XZ}的变化来实现对DI点的测控。
A.
亮度值
B.
指示灯
C.
电压值
D.
电流值
【单选题】稽留热的特点
A.
24小时体温波动的范围超过3℃
B.
24小时体温波动的范围超过2℃
C.
24小时体温波动的范围超过1℃
D.
24小时体温波动的范围不超过1℃
E.
体温固定在38.5℃
【简答题】下列函数中在所给的区间上是无界函数的为( )
【单选题】下列函数中在所给的区间上是无界函数的为______
A.
f(x)=cosx(-∞,+∞) B.f(x)=\r\n
B.
f(x)=arctanx(-∞,+∞) D.f(x)=arcsinx[-1,1]
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