China is a country with a rich culture in calligraphy(书法).1computers are everywhere in our life, Chinese people should not2the skill of writing with hands.

    Now the computer can help people to write. People are3computers more often than before. So many people are forgetting how to4Chinese characters(汉字). People often make a lot of mistakes in handwriting.

    Today, China is trying to help students and teachers to5their handwriting. We6that teachers can write well_7the blackboard and students can write well on their exercise books, too. Teachers should make their teaching plans and students should_8their homework by writing with their9. We are sure our handwriting can become10and better in this way.

“毛毛虫”与“蝴蝶”分别是昆虫发育的哪个时期（    ）

8－6=____

美国科学家因发现RNA干扰机制而获诺贝尔奖．RNA干扰是将外源微小双链RNA片段在酶的作用下分解为单链RNA并和某些蛋白形成复合物．这种复合物中的单链RNA与互补的mRNA结合，使mRNA被RNA酶裂解，从而使特定基因表达沉默．