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某设备原始价值为10万元，无论使用多少年，期末设备的残值均为1万元，设备的年使用费见下表。则该设备的静态经济寿命为()年。
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若采取到期一次性偿还，企业应向银行支付的本息合计是()万元。
Most people have had a dog or wanted one as their companion at some time in their lives. If you are thinking of buying a dog, however, you should first decide what sort of companion you need and whether the dog is likely to be happy in your house. Specialists' (专家) advice is useful to help you choose the most suitable kind of dog. But in part the decision depends on common
Different dogs were developed m perform. specific tasks. So, if you want a dog to protect you or your house, for example, you should choose the one that has the right size and characteristics. you must also be ready to devote(投入) a great deal of time to training the dog when it is young and give it the exercise it needs throughout its life, unless you live in the countryside and can let it run freely.
Dogs are demanding pets. Cats love the house and so are satisfactory with their place where there is secure, but a dog is loyal to its master and consequently wants him to show proof of his affection. The first consideration in buying a dog is whether the dog is likely to be happy in the surroundings you can provide. The best time to buy a baby dog is when it is between 6 and g weeks old so that it can transfer its love from its mother to its master. I？ baby dogs have not established a relationship with the human being until they are over three months old, their strong relationship will always be with dogs. They are likely to be too shy when they are brought out into the world to be- come good pets.
Which of the following is NOT true according to the passage？
The 20 gold medal winners are all primary and middle school students under the age of 14.
"Many of the problems are of college level and these pupils can figure them out. It is just unbelievable!" said a teacher from Guangdong province.
Named after China's most famous mathematician, Hua Luogeng, the contest started in 1986, one year after his death. In less than 10 years, it has been recognized by the State Education Commission as the country's biggest and best contest of its kind.
This news story is mainly about ______.
Intensive research is yielding important insight into E1 Nino, a periodic warming of tropical waters in the Pacific that can trigger devastating drought and flooding. Scientists are finding that the phenomenon exists in reverse; some call it La Nina. Typically E1 Nino, like the calamitous 1982 - 1983 event that brought misery to places as far apart as Ecuador, Australia, and southern Africa (National Geographic, February 1984), announces itself with strong westerly winds along the Equator, accompanied by a warm current that usually arrives off western South America around Christmas, which led to its name, Spanish for "the Child". Ocean fisheries suddenly collapse, and coastal deserts reel under torrential rains that sweep away villages.
Scientists now believe that between E1 Ninos there often are La Ninas: one-or-two-year periods when the surface water of the equatorial Pacific becomes cooler. Experts detected the onset of La Nina in the spring of 1988, leading some to link it to last summers' drought in the United States, flooding in Bangladesh, and the abnormal cold winter in Alaska and western Canada.
The early detection of E1 Ninos and La Ninas is an invaluable tool for long-range weather forecasting.
The best title for the passage would be ______.
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