《2024年悦然好学生必开卷九年级英语全一册人教版长春专版》

(C)
In the past men's hair began to turn grey at about the age of 30 and women's 35. However, today more people have grey hair sooner. Scientists have been working hard to know what causes grey hair because it seems that more than ever before, people want to look younger. Many people dye(染) their grey hair to make themselves look younger. But it is said that many dyes may cause cancer. So we had better not often dye our hair.
If we want to stay young, scientists and doctors say we have to learn about our medical situation and our lifestyle.
Researchers have discovered that a number of illnesses may make your hair turn grey or make you even lose hair. If you want to treat some illnesses, such as cancer, the treatment may also cause grey hair.
Hair is made up of protein. Many scientists believe that if you don't have enough protein, your hair may turn grey. So we need to eat enough protein to make our hair have normal color.
Philip Kingsley, a person who studies hair, thinks stress may cause grey hair. Another scientist, Tyler Cymet, thinks that stress that lasts for two or more years can cause the hair to turn grey. So if you want to stay young, you have to lower your stress level.
If you think your hair is turning grey too early, you can ask yourself if you are getting enough sleep. Some research suggests that sleep may affect your hair color.
In places like Spain, Greece, Mexico and South Asia, sleep is not only thought to be good medicine, but also very important. In these places it is common for people to sleep in the middle of a day. They believe it helps them to keep healthy and stay young.
根据短文内容,判断句子正(T)误(F)。(5分)
( )46. In the past, women usually began to have grey hair when they were about 35 years old.
( )47. The writer mainly talks about living environment in the third paragraph.
( )48. Eating enough protein can make our hair have normal color.
( )49. Both Kingsley and Cymet think heavy work is the main reason for grey hair.
( )50. Researchers believe that sleeping in the middle of a day helps people keep healthy and stay young.

答案： 46～50 TFTFF