解决青春期的困惑和迷茫，应该（） ①向老师和家长寻求帮助 ②学会自己当自己的心理

放射性核素显像与其他影像的比较，其不同之处包括（）。

A.核素显像不能显示脏器功能与血流

B.不同脏器显像需要相应的药物

C.相同脏器不同目的的显像需要不同药物

D.核素显像不能反映脏器的形态与结构

E.核素显像主要是反映脏器或组织的功能与血流

血型不合输血后，病人出现严重溶血反应，实验室检查的重要依据是( )

A．含铁血黄素尿

B．血尿

C．血红蛋白尿

D．网织红细胞增高

E．尿胆原

气相色谱-质谱法测定水中二氯酚和五氯酚的衍生化反应的关键在于脱水完全，否则会由于少量水分存在而使反应失败。

“类推”是一种重要的学习方法，但有时会产生错误的结论，下列类推结论中正确的是（    ）

A．钠、镁、铝具有强还原性，钠常温下与水剧烈反应，故镁、铝也是

B．盐酸、硝酸都是强酸，碳酸钙与盐酸反应制取CO₂，用硝酸也行

C．由2Fe +3Cl₂ = 2FeCl₃，可推出2Fe +3I₂ = 2FeI₃也成立

D．CO₂和SO₂都是酸性氧化物，SO₂能使酸性高锰酸钾溶液褪色，故CO₂也是

阅读理解

     Computers are very important to modern life. Many people think that in the future computers will be

used in lots of everyday life. It is thought that we won't have to go shopping because we will be able to get most things which are sold in shops on the Internet. There will be no more books because we will be able

to get all texts from computers. The Internet will be used to play games, see films and buy food. Most

telephone calls will be made by computers, too.

     Some people are glad about these new ways of shopping and communicating. Others do not think that computers will replace our old ways.

     Let's look at books, for example. Some people think that one day we will not read books made of

paper. Instead, we will buy and read books using computers. We will read texts on small pocket

computers. The computers will keep many different books in them at the same time. We won't need to turn lots of pages and paper will be saved. Computerized(计算机化) books will be used more and more.

     Is Internet shopping such a pleasure as going to the shop? Many people say it is not. It is a pleasure to go into shops and look at things you want to buy. It is also unlikely that many people will want to read

large texts on our computers. Because paper books will perhaps be more friendly. Maybe computers

won't change these two habits.

1. In paragraph1 it is thought people will use computers for _______.

A. playing games, shopping and making telephone calls

B. making telephone calls, having meals and seeing films

C. seeing films, buying food, and going for holidays

D. playing games, making telephone calls and seeing the doctor

2. Which reason for using computerized books is NOT said in the passage?

A. Computerized books won't be very expensive.

B. Computers can keep many different books in them.

C. We won't have lots of pages.

D. We won't need any paper.

3. The title for this passage is _______.

A. Computers will Replace Shops and Books  

B. Computers will be Used in the Future

C. Computers will Do Everything for Man

D. How Computers Change Our Habits