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问题 单项选择题

为了预防计算机被病毒感染，下列做法不合理的是（）。

A.计算机附近应避免磁场干扰

B.不使用来历不明的光盘、软盘

C.经常使用最新杀毒软件检查

D.不轻易打开陌生人发来的电子邮件

答案

参考答案：A

选择题

某些人睡觉常常磨牙是因为缺锌，这里的“锌是指        (    )

A．元素

B．分子

C．原子

D．离子
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单项选择题

Expressing gratitude is an important form of good manners. Nowadays more and more people in China have found it’ s high time to (16) a thankful heart for the young.

Everyone likes to get praised and appreciated. Gratitude is the greatest of virtues, which lets others smile and makes the world more beautiful. You just need several minutes to write down a thank-you note, but it brings much joy to the (17) .

We live in a society where we enjoy the different services of others. But (18) of them should be taken for granted.

Gratitude is also a kind of (19) in life. In developing gratitude for every moment--for the simple joys and even for the (20) times--we come to truly enjoy and appreciate life. Then we are able to see the (21) that surrounds us.

Try to write a thank-you letter to your parents for working hard to (22) you a happy life.

Be grateful to your teachers because of their (23) with your studies and character building.

Say thanks to your friends who (24) both your happiness and sorrow. We are sure it will bring them much joy and add (25) into your own life as well.

25（）

A.reflection 

B.justice 

C.taste 

D.color
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