题目

如图，飞机的航线和山顶在同一个铅垂面内，若飞机的高度为海拔，速度为1000km/h，飞行员先看到山顶的俯角为，经过后又看到山顶的俯角为，则山顶的海拔高度为(精确到)( )（参考数据：）．  A．             B．  C．         D．  答案：D   During summer vacations,I would volunteer at the vet's (兽医诊所) ，so I'd seen a lot of dogs. Minnie was by far the funniest-looking dog I'd ever seen. Curly hair hardly covered her sausage-shaped (腊肠形的) body. Her big eyes always looked surprised. And her tail looked like a rat's.   She was brought to the vet to be put to sleep because her owners didn't want her anymore. “No one should judge her by her looks”’ I thought. So instead of putting her to sleep,the vet and I gave her the chance to be adopted by someone else. I advertised Minnie in the local paper “ Funny-looking dog,well behaved,needs a loving family. ”   When a young man called,I warned him that Minnie was strange-looking. The boy on the phone told me that his grandfather's 16-year-old dog had just died. They wanted Minnie no matter what. I gave Minnie a good bath. Then we waited for them to arrive.   At last,an old car drove up in front of the vet's. Two kids ran to the door. They took Minnie to their grandfather,who was waiting in the car. I hurried behind them to see his reaction (反应) to Minnie.   The grandfather carried Minnie in his arms and touched her soft hair. She licked his face. It was love at first lick.   “She's perfect!” the old man said excitedly.   I was thankful that Minnie had found the good home that she deserved (应得) .That's when I saw that the grandfather's eyes were a milky white color— he was blind.1. From Paragraph 2 ,we know that Minnie .   A. didn't like people   B. was scared of people   C. was probably disliked by her owners   D. was the most beautiful dog at the vet's2. How did the vet deal with Minnie?   A. The vet decided to put her to death.   B. The vet tried to find a new owner for her.   C. The vet liked Minnie and adopted her.   D. The vet decided to sell Minnie.3. The underlined word “ adopted” means “ ”.   A. 收养   B. 安乐死   C. 购买   D. 治疗4. According to the story,which of the following is TRUE?   A. The author knew how the new owner would react.   B. Minnie became perfect in the end.   C. The two kids loved Minnie very much.   D. The grandfather showed great love for Minnie.5. What can we learn from the story?   A. It's hard for the blind to tell good from bad.   B. It's best to judge things by their appearance.   C. It's sad that the blind live in the dark.   D. Blindness can't stop one's kindness.