在过氧化氢将铁（Ⅱ）离子转变成铁（Ⅲ）离子时，过氧化氢起氧化剂作用。

阅读理解。

     The weather is getting hotter. You are thirsty playing basketball or riding home from school. A cold drink

may be just the thing. But be careful what you are drinking. Something that looks cool may not be good for

your health.

     There are plenty of "energy drinks" on the market. Most of them have beautiful colors and cool names.

The lists on them tell you they are helpful to your health. Sounds great!

     But after a careful check you may find that most energy drinks have lots of caffeine (咖啡因) in them.

These drinks are especially aimed at young people, students, busy people and sports players. Makers sometimes

say their drinks make you better at sports and can keep you awake. But be careful not to drink too much.

     Caffeine makes your heart beat fast. Because of this, the International Olympic Committee has limited (限

制) its use. Caffeine in most energy drinks is at least as strong as that in a cup of coffee or tea. Possible health

dangers have something to do with energy drinks. Just one box of energy drink can make you nervous, have

difficulty sleeping and can even cause heart problems. Scientists say that teenagers should be discouraged from

taking drinks with a lot of caffeine in them.

1. Many people like drinking energy drinks because of the following EXCEPT that _____.

A. they have beautiful colors and cool names

B. they have lots of caffeine

C. they can keep them awake and better at sports

D. they are said to be helpful to health 

2. The main reason for people not to drink too much energy drinks is that they may cause _____.

A. heart problems

B. nervousness

C. sleeping difficulty

D. possible health dangers

3. The underlined word "discouraged" can be replaced (替换) with "_____".

A. encouraged

B. stopped

C. helped

D. disliked

4. From the passage we can know that _____.

A. advertisements are important in getting people to buy energy drinks

B. energy drinks are helpful to teenagers' study

C. sports players need to drink a lot of energy drinks

D. energy drinks are especially aimed at teenagers

5. Which of the following can be the best title (标题) of the passage?

A. What's the Use of Energy Drinks?

B. Who Can Drink Energy Drinks?

C. What's That in Energy Drinks?

D. Why Can't We Buy Energy Drinks?

肝郁血虚，脾失健运。见两胁作痛，神疲食少，脉虚弦者，治宜选用

A．一贯煎

B．越鞠丸

C．逍遥散

D．四逆散

E．四君子汤

高血压伴有低血钾（）

A.肾动脉狭窄

B.原发性醛固酮增多症

C.尿毒症

D.皮质醇增多症

E.嗜铬细胞瘤

把被镀的金属材料浸人熔化的镀层金属液中，经过一段时间取出，使金属表面沾上一层镀层金属，属于设备及管道防腐蚀覆盖层法的（）。

A．喷漆

B．电镀

C．渗镀

D．热镀

企业对于跨年度的劳务，应采用完工酉分比法确认收入。( )