下列说法正确的是（ ）.
A．一条直线和一个平面平行，它就和这个平面内的任一条直线平行
B．平行于同一平面的两条直线平行
C．如果一个平面内的无数条直线平行于另一个平面，则这两个平面平行
D．如果一个平面内任何一条直线都平行于另一个平面，则这两个平面平行
答案：D
因为
A. 一条直线和一个平面平行，它就和这个平面内的任一条直线平行，不符合线面平行的性质定理。错误
B. 平行于同一平面的两条直线平行，可能异面或者相交，错误
C. 如果一个平面内的无数条直线平行于另一个平面，则这两个平面平行，可能相交，错误。
D. 如果一个平面内任何一条直线都平行于另一个平面，则这两个平面平行，成立，故选D
| 阅读理解。 |
| One day, I was driving along a country road at 80 miles an hour. Suddenly a chicken came along. It ran faster than my car. I was surprised. I drove faster and ran after the chicken, but it was out of sight. Soon I got to a farm house. The farmer was standing by the door and looking down the road. I stopped my car, got out and walked up to the farmer. "I have just seen a chicken running at 80 miles an hour or more. I can't believe it." "Ah, that was one of mine," the farmer said. "One of yours! But how can a chicken run that fast?" I asked. "Well, it's like this. People around here like to eat chicken legs. I wanted to make more money, so I decided to breed (饲养) chickens with three legs. Everything went well. Soon I was breeding a lot of three-legged chickens. It's that extra (额外的) leg that makes them run so fast." "That's interesting," I said, "And what do these three-legged chickens taste like?" "I don't know," the farmer said, "Because I have never been able to catch one." |
| 1. The chicken usually runs a car. |
[ ] |
| A. as fast as B. a little faster than C. much slower than D. as slow as |
| 2. I didn't catch the chicken because . |
[ ] |
| A. I didn't run after it B. it ran over 80 miles an hour C. I drove too slowly D. a farmer got it |
| 3. The farmer thought . |
[ ] |
| A. three-legged chickens would bring him more money B. three-legged chickens ran faster than two-legged ones C. all the people liked to eat chicken legs D. I would buy his chickens |
| 4. The three-legged chickens . |
[ ] |
| A. tasted better than two-legged ones B. were very delicious C. looked terrible D. could run faster than a car |
| 5. Which of the following is true? |
[ ] |
| A. The farmer kept one three-legged chicken. B. The three-legged chicken made the farmer rich. C. The farmer couldn't run fast enough to catch the three-legged chickens. D. All the three legs made the chicken run faster than a car. |