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下列反应中必须加入还原剂才能进行的是（　　）

A．Cl₂→Cl^-

B．Zn→Zn²⁺

C．H₂→H₂O

D．CuO→CuCl₂

根据短文内容，判断句子正误，正确的写“T”，错误的写“F”。

     Clothes are very important in our life. Different people wear different clothes. Now let's listen to some

people in France talking about clothes.

     Hello, I'm Betty. I started working this year, so I'm able to buy new clothes more often than before. I

think what I look like is really important to me, so I spent much money on clothes. I like to wear bright

colors when I go to parties. I often buy all kinds of clothes and try to follow the latest fashion.

     Hi, I'm Jack. I don't have much to say about clothes. Clothes aren't the thing I'm interested in. I know

little about the way of dressing. In summer, I always wear a T-shirt or something else.

     My name is Alice. I would like to say that clothes must be comfortable and feel easy to put on. Sometimes

I buy clothes in some small street markets - they are cheap there. I change the look of my clothes quite

often-put some flowers on them or use different buttons (纽扣), just for a change. They'll look good all the

time. I go shopping for clothes about once a month.

( )1. Different people like the same clothes.

( ) 2. Buying clothes cost Betty much money this year.

( )3. Jack doesn't care about whether the clothes are fashionable or not.

( )4. Alice likes putting some flowers on her hair to be beautiful.

( )5. Alice goes shopping for clothes about twelve times every year.

牧竖①拾金

刘元卿

有牧竖，敝衣蓬首赤足，日驱牛羊牧冈间，讴而乐，意惬甚，牧亦善。一日，拾遗金一饼②，内衣领中。自是歌声渐歇，牛羊亦时逸，心患失金，斯乃为金所累也。

注释：①牧竖：牧童。     ②一饼：一块。

小题1:解释加线的字。(４分)

⑴敝衣蓬首赤足（     ）   ⑵讴而乐（     ）

⑶心患失金（     ）       ⑷自是歌声渐歇( )

小题2:牧竖“歌声渐歇，牛羊亦时逸”的原因是什么？（请用自己的话加以概括回答）这篇文章给我们什么启示？（3分）

___________________________________________________________________________

大脑皮质运动区的部位是（）

A.中央前回

B.中央后回

C.额叶

D.枕叶

E.颞叶

灰水换热E1407有何特点？