问题 选择题

国家药品监管局已发出通知,禁止使用含PPA的感冒的药物。PPA是盐酸苯丙醇胺的英文缩写,其结构式如右下所示,下列对苯丙胺醇的说法中错误的是

A.它的化学式是C9H13NO
B.它是苯丙胺酸的同分异构体
C.它具有弱酸性,可与强酸反应生成盐 D.它可发生酯化和消去反应

答案

BC 

分析苯丙胺醇的结构,判断其化学性质。

阅读理解

Teens’ lives hit by economy

Some teenagers are crossing their dream colleges off their lists. Others are thinking of skipping(略过)their senior trips or reducing prom(毕业舞会)costs. Many are finding their work hours cut while their expenses rise.

So, who exactly is punishing them?Is it their parents, teachers or employers?No, it’s the economy(经济状况).

If you are like most teenagers, you probably don’t understand what “recession”, “negative economic growth” and “subprime mortgage crisis (次贷危机)”actually mean. And you probably don’t spend your days watching the ups and downs of the stock market.

It’s safe to say that most teens don’t know much about the economy except for one thing:it’s bad. But just how exactly is the economy affecting teens?

“The single largest thing I have noticed is the recession’s ability to affect my college choice, “said Heather Richars from Downey High School in California, US. “With the economic situation the way it is, I have thought less about going to a private or out-of-state university, and more about public schools in California, mainly because of the price of tuition, “said Richars. “I had been a fan of attending a private school up until this year.”

The economy cuts into other areas of teenagers’ lives, too.

Joey Camarda, a student at Modesto High School in California, who works at an ice cream store,  said,“ Probably due to the economy, I have been getting less hours at my job, and because of that, I am not getting enough money to help pay for college.”

Tara Mooney, a senior at Beyer High School, has also begun to notice that money is tight.

“Things are getting expensive,” she said. “When it comes to applying for colleges and wanting to go on senior trips, I have to pick and choose instead of doing it all.”

小题1:The purpose of writing the passage is mainly to tell us ________.

A.the economic recession has had a big effect on teens’ work, life and study

B.teenagers are now having difficulty in deciding which colleges to apply for

C.teenagers don’t know much about the economic recession

D.teenagers are considering giving up their senior trips to save money小题2:Because of the bad economic situation, Heather Richars will most probably ________.

A.go to a private university

B.attend an out-of-state college

C.attend a public college in California

D.find a good university as he planned小题3:How has Joey Camarda found the recession affects him?

A.He has to find more part-time jobs.

B.He has to help his mother do more chores.

C.He has found that he had more time to study.

D.His plan to pay for college will be hard to realize.小题4:What can we conclude from the passage?

A.Parents punish their teens by giving them less money.

B.Most teens understand what negative economic growth means.

C.Teenagers are finding it harder to do what they want than before.

D.Teenagers have realized the importance of managing their own money.

选择题