题目

下列项目判断，结论正确的是（ ） 选项项目结论 A三种有机化合物：乙烷、氯乙烯、苯分子内所有原子均在同一平面上 BC4H8Cl2的同分异构体数目（不考虑立体异构）共有10种 C乙烯和苯都能使溴水褪色褪色的原理相同 D由乙酸和乙醇制乙酸乙酯，油脂水解均属于取代反应 答案：D阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。The best way to deal with sports injuries is to keep them from happening in the first place. Knowing the rules of the game you're playing and using the right1. (equip) can go a long way toward preventing injuries. If you think you've been injured, pull 2. (you) out the game or stop 3. (do) your activity or workout. Let a coach or parent know what happened in case you need to see a doctor. Serious head and neck injuries happen most often in athletes4. play contact sports like football. Keep the injured person still with his or her head 5. (hold) straight while someone calls for emergency 6. (medicine) help. If the person 7. (lie) on the ground, do not try to move him or her.Your first question after a sports injury will 8. (probable) be, "When can I play again?" This depends on the injury and what your doctor tells you. Even if you can't return to your sport right away, a doctor might have suggestions and advice 9. what you can do to stay fit. Always check with your doctor一 10. trying any activity following an injury.