“千里之堤溃于蚁穴”这一成语主要揭示了（ ）
A．生物能影响环境
B．生物能适应一定的环境
C．环境能影响生物的生存
D．生物与环境可以相互影响
生物必须适应环境才能生存，如在沙漠上植树必须种植耐旱树种沙棘、沙枣才能容易成活，若种植需水较多的水莲很难成活．生物也能影响环境，如蚯蚓改良土壤．“千里之堤，溃于蚁穴”指的是一个小小的蚂蚁洞，可以使千里长堤溃决，体现了生物对环境的影响．
故选：A．
| 阅读理解。 |
| Recently a really strange thing happened at Wuhan Liangdaojie Middle School in Hubei. Over 600 Junior 1 and 2 students at the school took part in a "caring for an egg like a baby" activity. They were asked to keep an egg close at hand for a month without breaking it. "It's hard for parents to bring up their children but many students take their parents' love for granted. (把…当作理所当然)," said Liu Kang, the school's director. "We wanted them to learn that lesson by taking care of an egg as a baby." Li Mingxuan is one of the students. His egg didn't break during the month, but he felt exhausted. "You had to put so much attention to it," said the 13-year-old boy, "I now understand how much my parents have done for me. I'll prepare them a glass of milk to help them sleep better every night." Not everyone was as lucky as Li. More than 450 of the 600 students broke their eggs. Yan Yueming broke his egg in just five days, which made him very frustrated. He said, "I can't imagine how sad my parents would be if there was something wrong with me, their 'egg'!" I want to return their love and I'll help them with chores every day." promised the 13-year-old boy. |
| 1. Li Mingxuan felt very ______ during this month. |
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| A. frustrated B. sad C. exhausted D. happy |
| 2. ______ were broken in the month during this activity. |
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| A. No eggs B. All the eggs C. 600 eggs D. More than 450 eggs |
| 3. According to this article, we know after this activity Yan Yueming will ______. |
[ ] |
| A. help his parents with chores every day B. prepare his parents a glass of milk to help them sleep better C. not break the eggs any more D. be glad to help others |
| 4. The aim of this activity is to ______. |
[ ] |
| A. teach the students to be more careful B. teach the students the eggs are fragile (易碎的) C. teach the students to understand their parents D. teach the students to love their teachers |
| 5. What can we infer (推断) from the article? |
[ ] |
| A. The students always argue with parents at home. B. The students don't study hard at school. C. The students don't like this activity. D. The students learn to love their parents through this activity. |