Blood also protects you.It has special cells in it that fight germs.The cells in your blood that fight germs are called“white cells”.These are like an army for your body.They kill harmful germs that get into your blood.When a large number of germs enter your body,the number of white cell“soldiers”grows.A lot of blood moves to the area where the germs are.The white cell soldiers attack the germs and kill them.The used white cells and dead germs form the thick yellow liquid called pus(脓).If the pus is inside a sore on your skin,it may leak out.1. about your blood
2. ______ blood travels From your heart to the 3.______,the capillaries and your 4. ______ back to your heart.
Why you need blood to feed your 5.______
to clean your cells by 6.______ up wastes from them
to 7.______ your cells stay healthy
How blood 8.______ you fighting germs with 9.______ cells
helping to form the thick yellow 10. ______ called pus
参考答案与解析
课时作业(十)
Unit 5 B卷
一、阅读理解
解题导语:40年后的客机会是怎么样的?欧洲飞机制造商空中客车公司最近公布了他们的构想——透明客机。由于这种未来客机采用透明材料制造,乘客可以从万米高空透过舱壁,向上仰望着繁星点点的如墨夜空,向下俯瞰万家灯火的城市美景。
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