下列关于信道利用率的说法，不正确的是（） A.信道利用率是指信道花费在发送与接收帧的

Excuse me,______ do you say that in English?      [ ]

A. how  

B. who  

C. where  

D. what

.

第II卷(共45分)

第四部分：书面表达(共两节，满分45分)

第一节：阅读表达(共0． 5小题．每小题3分，满分15分)

阅读下面的短文，请根据短文后的要求答题(请注意问题后的字数要求)

Some weight-loss camps, which are rare in China just a few years ago, have sprouted（萌芽） in Beijing, Qingdao, Shenzhen, and other cities. Today about 15 percent of adults, or 200 million Chinese, are reportedly overweight. Of these, 90 million—about 7 percent—are obese（极肥胖的）.

Experts say the obesity epidemic is spreading to children, though more slowly than in adults. The trend, they say, will have a huge impact on the health of China's citizens and economy. "We're seeing a very large proportion（比例） of children and adolescents who are quite heavy and aren't moving much," said Barry Popkin, a nutrition professor. Popkin carries out an ongoing health-and-nutrition survey of 16,000 households in China. He says more kids today are overeating and putting on weight "quite quickly." In just ten years China's childhood obesity rate has doubled, with the greatest gains coming in urban(城市的) areas. "In big cities it's a big problem." 

Some experts blame the extra fat on a range of factors, many of them tied to China's rapidly changing economy and culture. The diets of Chinese adults and children are far higher in calorie-laden meats, fish, eggs, dairy products, fats, and sugars than ever before. __________, kids—especially city dwellers—are more sedentary(久坐的) today and spend more time indoors in front of homework, television, computer games, and the Internet.

Shuwen Ng, a health economist, says that kids in China now have pocket money, and they spend a portion of it on junk food. Ng adds that advertising and peer groups influence kids' food choices. Certain foods, such as new candies or fast food, have attractive features.

China's childhood obesity rate still lags that of the United States, where some 15 percent of kids are said to be obese. But the long-term effects are equally serious.

76．What is the best title of the passage?（Please answer within 10 words）.

_______________________________________________________________________________

77．Which sentence in the passage can be replaced by the following one?

Children’s obesity can have a very bad effect on the body conditions of the whole country and will cause a loss in the economy.

_______________________________________________________________________________

78．P1ease fill in the blank in the third paragraph with proper words or phrases to complete the sentence.

_______________________________________________________________________________

79. Which of the reasons that cause children’s obesity epidemic do you agree most? Why? （Please answer within 30 words. ）

_______________________________________________________________________________

80．Translate the underlined sentence in the last but one paragraph into Chinese·

_______________________________________________________________________________

为商品流通网络建立提供雄厚物质基础的是城市发达的（）

A.商业体系

B.金融体系

C.工业体系

D.文化体系

患者，男，60岁。反复胃脘部隐痛不适10余年，近 1月因劳累而加剧，疼痛绵绵不休，喜温喜按，空腹痛甚，得食则缓，吐清水，神疲纳呆，四肢倦怠，便溏，舌淡苔白，脉虚弱。
要求写出：诊断、证型、治法、方药。

读华北某地地形图，据图回答下列小题。

①②③④四条坡面线的坡度比较（）

A．①＜③

B．①＜②

C．①＞②

D．③=④