When we have small cuts in the skin,短文及选项答案

When we have small cuts in the skin,短文及选项答案

When we have small cuts in the skin(皮肤),something strange may happen．The cuts are able to heal(痊愈) themselves in a couple of days．How does this happen? Read on,and you will find out the secret．
Every living thing on the earth is made up of cells(细胞)．Cells grow and make new cells．Most cells are very tiny and we can’t see them with our eyes．Different cells have different uses．Our skin cells are special ones．The cells on the surface(表面) of our skin are old dead cells．New skin cells are right under the surface．These ale the living skin cells．They do work for our bodies．They help protect our bodies and heal cuts．
Our bodies make skin cells all the time．As the old cells fall off, new cells grow in the same place．Each person makes about 1 8 kg of skin cells during his or her life．Surface skin cells fit together closely with no gaps between them．When you cut or bum yourself, you can harm your skin cells．A small cut will not do much harm．Your skin will quickly heal itself by making new skin cells．How do skin cells work? First,the cells near the cut get bigger and move into the gap．Next,these bigger cells meet in the middle．They form a new layer(层)of skin cells．Finally,new cells will grow until the gap disappears completely．In this way,your skin Can grow and get well itself．
How amazing the tiny cells ale! Next time you have a cut,don’t worry about it．Maybe in a few days,you will be surprised to find it healed．
1. The underlined word “gaps” in the passage means “______” in Chinese．
A．突起 B．条纹 C．缝隙
2. From the passage,we know that cells ______．
A．are large and we Call see them with our eyes
B．can grow and make new cells
C．aren’t in most living things
3. Skin cells heal cuts in three steps．______ is the right order．
A．a→ b→ c B．b→ c→ a C．a→ c→ b
4. Which of the following is TRUE according to the passage?
A．Each person Can make 18 kg of skin cells every day．
B．Different cells have different uses in our bodies．
C．The skin cells have little work to do in the body．
5.The best title for this passage should be ______．
A．HOW SKIN CELLS HEAL CUTS
B．THE IMPORTANCE OF SKIN
C．HOW TO PROTECT OUR FINGERS
【语篇解读】
本文是一篇说明文.文章介绍了地球上活着的东西是由细胞组成的,不同的细胞有着不同的作用.我们的皮肤细胞更是不同的一种.它能变大来填补由皮肤切口造成的缝隙,从而使切口痊愈.
【答案解析】
1. C 词义猜测题.根据前半句：Surface skin cells fit together closely可知细胞是紧密连在一起的,没有缝隙.
2. A事实细节题.项与文章第二段第二行不符,细胞是很小的看不见的,而不是很大能看见.C项与文章第二段第一句：Every living thing on the earth is made of cells.不符合.根据文章第三段可知B项正确.
3. B 推理判断题.根据文章第三段的描述可知,皮肤出现切口,周围的细胞变大,然后这些大的细胞结合到一起,然后形成新的皮肤细胞层.
4. B 事实细节题.根据文章第二段第二行：Different cells have different uses.可知B项正确.A项中的every day与文章的during his or her life不符.C项中的little work与文章的They do work for our body.不符.
5. A标题理解题.整篇文章重点介绍了皮肤细胞使皮肤切口愈合的情况,所以最佳标题应是A.
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