1.
NASA (National Aeronautics and Space Administration 美國國家航空航天局) will start a new search for astronauts to go on future space tasks.This is part of their plan to get people living on Mars within the next 20years.(106)C
You've got to be smart.
In order to be an astronaut,you have to study subjects like science,math or engineering at university.This is so that you can do experiments(實驗) in space and then send back the results to scientists on the earth.(107)E
You've got to be physically strong.
Living in space may cause all kinds of problems for the human body.(108)A After five months in space above the earth,an astronaut would typically lose as much as 40% of muscle(肌肉).Astronauts have to exercise in space to keep their muscle active.
During blast-off(發(fā)射),astronauts can experience great force of gravity(重力) pressing down on them.(109)F
You've got to be brave.
Spacemen and spacewomen have to go through some very hard training before they become astronauts.Scientists have to be sure that the trainee is strong enough both physically and mentally (精神上) to live and work in space.(110)B As part of their job,astronauts might need to go to new places humans have never been to before,so they need to be brave.
A.For example,you may lose some of your muscle.
B.You may get lonely when you are far away from your family,so they have to be mentally strong until they see their family again.
C.So what does it take to be an astronaut?
D.It is looking for men and women between 157and 190.5cm.
E.A good education also helps astronauts understand how to fix things in the spaceship.
F.They have to be physically strong deal with this.
G.Muscle is very important for humans'body.