题目

人体内血液经过肺循环，所发生的主要变化是 A. 动脉血变成静脉血                B. 静脉血变成动脉血 C .含养料多的血变成含养料少的血     D. 含养料少的血变成含养料多的血 答案：B11．Write at least 60words about the topic"How to protect myself"．以"如何保护自己"为题，写一篇不少于60个词的短文，标点符号不占格．提示：自我保护是青少年需要掌握的重要技能．请谈谈你在生活中怎样进行自我保护（可结合生活中的某一个情景或具体事例，如：面对灾难如何自救，如何预防受骗或侵    害，如何避免生活中的意外，等等Phrases for reference（以下短语仅供参考）：ask…for help    calm downin danger prevent…from（注意：文中不得出现具体人名、校名等个人信息，否则不予评分．）Self-protection is very important．Here are ten tips for you．Try to stay with friends on the way to school or home．If you are alone，try not to talk with strangers．If someone follows you all the time，you must keep calm and ask your friends or parents for help on the phone．Call 120 for help in time．If you have a car accident or someone is hurt，you should call 120 quickly．It can mean the difference between life and death．Be careful when using the Internet．You may use the Internet to get useful information in your free time．But don't believe anything you read on the Internet．If an online friend asks you to go out and meet him or her，you should let your parents know first and listen to their advice．．