person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will no be discovered until the birth of deformed children or even grandchildren.
Missions of the Apollo flights have had to cross belts of high amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.
31. According to the first paragraph, the atmosphere is essential to man in that _______.
A) it protects him against the harmful rays from space
B) it provides sufficient light for plant growth
C) it supplies the heat necessary for human survival
D) it screens off the falling meteors
Missions of the Apollo flights have had to cross belts of high amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.
31. According to the first paragraph, the atmosphere is essential to man in that _______.
A) it protects him against the harmful rays from space
B) it provides sufficient light for plant growth
C) it supplies the heat necessary for human survival
D) it screens off the falling meteors