下列说法：①任何非零有理数的平方都大于0；②互为相反数的两个数的同一偶次方相等；
题型：选择题
问题：
下列说法：①任何非零有理数的平方都大于0；②互为相反数的两个数的同一偶次方相等；③任何数都不等于它的相反数；④如果a大于b，那么a的倒数小于b的倒数．其中正确的只有（ ）
A．①②④
B．①③
C．②③④
D．①②
题型：选择题
| 阅读理解。 | ||
Making peace at lunchtime | ||
| It was my first day at school. I felt nervous and went to all my classes with no friends. I listened carefully to all the lessons and waited for lunch. Then, finally, the bell rang. It was time to talk and have fun. In the lunch line I met a new friend who wore a hijab (穆斯林女性) on her head, and though I am Jewish (犹太人), we got along fine. I was so happy when she said: "Sit with us at our table." She pointed to the table next to the door. So I agreed. I took my tray (餐盘) and was about to walk with her across the floor, when suddenly someone touched my arm. "Hey, I saw you on the bus," said a tail girl in a long skirt. "1 see your Jewish star necklace. You should sit with us." At that moment I looked around, the Spanish only sat with other Spanish, the Russians always with the Russians and never the Arabs (阿拉伯人) with the Jews. I saw how wars got started. Everyone sticks to (坚持) his or her own kind. The lunchroom was a map of the world. Why was everyone so blind? And so I turned this girl down, and went with the first, and there was no enmity (敌意). I built a bridge between two worlds when I sat with those different from me. | ||
A. On her first day at school. B. During her first class at school. C. After lunchtime at sch  ool. D. Before waiting in the lunch line. 2. The girl who wore a hijab on her head is _________. A. the Spanish B the Arabs C. the Russians D. the Jews 3. The writer didn't know what the tall girl meant until she _________. A. sat with her B. got a star necklace C. looked around D. walked across the floor 4. Which of the following can best explain why the lunchroom was a map of the world? A. Suddenly someone touched my arm. B. The Spanish only sat with other Sp  anish.C. I listened carefully to all the lessons. D. Everyone was so blind in the lunchroom. 5. The writer gives us a 9ood example in making peace because she ____ . A. realised how wars got started B. didn't get along well with others C. pointed to the table next to the door D. built a bridge between two worlds |
