“橘生淮南则为橘，橘生淮北则为枳。”这说明了（ ）
①事物的存在和发展同一定的条件有关 ②外在的环境和条件直接影响事物的存在和发展，因而外因是事物变化发展的根本原因 ③内因是事物变化发展的根本原因，但外因是事物变化发展所不可缺少的条件 ④事物的变化发展都离不开外部条件，外因是第一位的原因
A．①②
B．①③
C．③
D．①④
答案：B
本题考查外因在事物发展过程中的作用。很明显，题肢②④谈到的外因是根本原因、第一位的原因错误。故只选题肢①③。
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| LIU XU was robbed (抢劫)! The 13-year-old boy was 1 home when a man suddenly jumped out from the roadside. He pulled Liu off his bike and rode away. Liu was scared, but he didn't run 2 the robber. He found a telephone and called the 3 at 110. " 4 is the priority (要务) in such a situation," Liu said, remembering what his teacher had told him in his first-aid class. "It is not safe to chase an adult who is much 5 than you." Liu is a junior student at Shenzhen Bao'an Middle School in Guangdong. His school is one of the first in China to have compulsory (必修的) first-aid education. Junior 1 students at the school 6 take the class once a week. Teenage safety has become a serious problem these days. According to a 2004 7 , about 16,000 teenagers die in accidents in China every year. Bao'an School said that the first-aid classes are to"teach students skills so that they can protect and save 8 in emergencies (紧急情况)." "The teacher told us that we should try not to go out 9 , especially at night. If someone tries to do bad things to us, we may hit their eyes or noses. Then we should quickly run into a 10 place," said Zhong Hua, a 13-year-old girl. | ||||
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