题目

200mL含有0.10mol碳酸钠的溶液和100 mL稀硫酸，不管将前者滴入后者，还是将后者滴入前者，都有气体产生，但最终生成的气体体积不同，则硫酸的浓度合理的是 A. 0.2mol · L-1      B. 0.8 mol · L-1          C. l.5 mol · L-1         D. 2 mol · L-1 答案：B Two magazines recently listed the best cities to live in. Here are two of the cities listed as “the world’s best.” SAN JOSE, COSTA RICA  The city has comfortable weather all year round (15°C to 26°C ). Housing is not very expensive in San Jose. Also, many of the city’s older neighborhoods are very beautiful and have small hotels and cafés(咖啡馆). Beautiful mountains are around the city. You can visit them easily from San Jose. So lots of people go sightseeing there every year. But air pollution is a problem in the city center. HONG KONG, CHINA This lively city—once a small fishing village—is today an international business center. It is an interesting mix of East and West, old and new. Modern tall buildings are next to small temples (庙宇). Popular nightclubs are close to traditional teahouses. Busy people fill the streets at all hours of the day. But outside the city, there are parks for walking or relaxing. Hong Kong is famous for its wonderful native dishes. There’s also food from Europe, North America, and other parts of Asia. However, this small city has a large population. Nearly seven million people live in Hong Kong! That’s why housing is often very expensive. Traffic and air pollution are also a problem. 1. Which of the following is not mentioned about San Jose? A. The weather.                 B. The mountains.        C. The air.        D. The traffic. 2. What makes Hong Kong the world’s best according to this passage? A. The lively city and the wonderful dishes. B. The beautiful mountains and the lively city. C. The expensive housing and the food.           D. The city and the people. 3. The writer thinks housing in Hong Kong is expensive because     . A. it was a small fishing village              B. it is a mix of East and West C. it is famous for its wonderful food       D. there are too many people in the city 4. What do the two cities have in common? A. They both have beautiful mountains.      B. They both have a large population. C. Air pollution is a problem in both.         D. They are both crowded. 5. From the passage, we can know that     . A. San Jose and Hong Kong are the only two cities of the world’s best B. San Jose has more natural sights than Hong Kong does C. the weather in both cities is fine D. Hong Kong is the more popular city of the two