开工过程中反应塔压力高原因主要为（）. A.塔顶温度高 B.塔内有不凝汽 C.没有打

进行物质导电性实验测定时，按照图a、图b分别接通线路，下列叙述正确的是（　　）

A．NaCl是电解质，图a、图b灯泡均会发光

B．图a灯泡不会发光，NaCl固体中不含Na⁺、Cl^-

C．NaCl溶液在通电后发生：NaCl═Na⁺+Cl^-

D．通电前图b溶液由大量H₂O、Na⁺、Cl^- 构成

Some weight-loss camps, which are rare in China just a few years ago, have sprouted 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 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 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. In addition, kids—especially city dwellers—are more sedentary 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.

小题1:According to the passage we know _____.

A．weight-loss camps have been very popular in China six years ago

B．about 290 million Chinese are overweight in China in all

C．in China childhood obesity rate in rural areas is lower than that in major cities

D．America’s childhood obesity rate is lower than China’s小题2: Which of the following is NOT the reason of China’s childhood obesity?

A．Advertising on some new candies

B．High quality diets

C．Playing computer games for long time

D．Having pocket money小题3: The underlined word “sedentary” in the second paragraph probably means _____.

A．attentive

B．earnest

C．absent

D．inactive小题4: According to the passage we can infer _____.

A．obesity explosion in China will affect the United States

B．there is great difference in kids’ food choices now

C．junk food contributes to childhood obesity

D．city children eat more than rural children小题5:What’s the best title for the passage?

A．Chinese Childhood Obesity Explosion

B．Weight-loss Camps in China

C．Obesity Explosion’s Impacts On Chinese Economy

D．Obesity Explosion In China And America

焖发煮到一定程度时，需改用小火、微火，或将锅端离火源，（）使温度逐渐下降，让原料从外到里全部涨发透。

A、慢慢的

B、迅速

C、打开盖子

D、盖紧盖子

变换炉装填催化剂时，催化剂的自由下落高度应小于（）；炉内人员不得踏在触媒床层上，应踏在木块上。

A、0.5m

B、1m

C、1.5m

D、5m

毛 * * 的《沁园春·雪》一共写了几位帝王？