题目

海带中含有丰富的碘（I），实验室从海带中提取碘单质的化学反应方程式是2NaI＋Cl2 == 2NaCl＋I2，此反应属于 A．置换反应B．分解反应C．化合反应D．复分解反应 答案：A解析:由一种单质和一种化合物反应，生成另一种单质和另一种化合物的反应，为置换反应，由题意可以看出此反应属于置换反应。故选A.The first day of school we were interested to get to know a new classmate.I looked around when a gentle hand touched my shoulder.I found a little old lady with a warm smile.She said,“Hi ! I’m Rose.I’m 87 years old.Can I give you a hug?”I laughed and I heartily responded,“Of course!”“Why are you in college at such a young,innocent(天真无邪的)age?”I asked.She jokingly replied,“I’m here to meet a rich husband,get married,have children, and then travel around.”“Not seriously,”I asked.I was curious why she took on this challenge at this age.“I always dreamed of having a college education and now I’m getting one!”she told me.We became instant friends.Over the year,Rose became a campus icon(偶像) and she easily made friends wherever she went.She loved to dress up and she enjoyed the attention from the other students.At the end of the semester,we invited Rose to speak at our football banquet. I’ll never forget what she taught us.“We do not stop playing because we are old; we grow old because we stop playing.Here are the secrets to staying young.You have to laugh and find humor every day.You’ve got to have a dream.When you lose your dreams,you die.Unfortunately we have many people like this walking around?”she said.“There is a huge difference between growing older and growing up.Anybody can grow older.That doesn’t take any talent or ability,”she added.“But growing up requires finding the opportunity in change.Have no regrets.The elederly usually don’t regret what they did,but rather things they did not do.”One week after graduation that year,Rose died peacefully in her sleep.She taught us by example that__________________.小题1:Why was Rose in college at 87? Because        .A．she wanted to meet a rich husbandB．she wanted to get married and have childrenC．she wanted to travel aroundD．she dreamed of having a college education小题2:According to the passage,Rose loved to do the following EXCEPT       .A．dress upB．enjoy the attention from the other studentsC．play footballD．make friends小题3:According to what Rose said,we can know that to stay young you must not     .A．laughB．be humorousC．have a dreamD．lose your dream小题4:According to the last paragraph but one we know         .A．growing older is quite different from growing upB．growing older needs talentC．growing up doesn’t require abilityD．the elderly usually have no regrets小题5:Which of the following can be used to fill in the blank at the end of the passage?A．where there is a will, there’s a wayB．never too late to learnC．Study hard and you will be youngD．never too late to be all you can possibly be