Friendship can deeply affect the physical and mental health of both men and women. Studies show that people who have no friends or who are lonely，are more likely to die earlier，get sick more often and suffer greater physical wear and tear（折磨）than those who have a support system of friends.
Sometimes，family members may be more likely to give you advice or tell you what you don’t want to hear. It may not be as good as a friend who will listen to you and guide you，but support your decisions anyway. The most important elements about friendship are those who suffer support and do not judge your decisions based on society.
One reason for the link between social support and good health practice seems to be that people who feel cared for by others are less stress-out and are protected against the symptoms（症状）of depression and loneliness.
Generally，women benefit most because of how they deal with stress. Women are more social in how they deal with stress than men, while men are more likely to have a“fight or flight”reaction.
Women also tend to have larger，denser social network，in which more people know each other and help each other, while men typically have smaller groups of friends and will rely on their wives or other important people for more support. While all these affect people psychologically（心理上），friendship brings comfort that reduces the ill effects of stress, and the sex difference also contributes to the difference in the length of one’s life time.
63．In the author’s opinion，a real friend should _____.
A．tell you what to do even if you refuse to hear it
B．try to persuade you to change your mind quickly
C．judge your decision according to his／her experience
D．give you advice but respect your own decision
64．Women benefit more from friendship than men because_____.
A．women are always cared for by more people than men
B．women are usually less stress—out when staying with others
C．women are more likely to solve problems with friends’ help
D．women can always keep more long-life friendship than men
65．According to the passage we can infer that _____.
A．it’s good for women to tell men what they should do or not
B．friends are always more important than family members
C．men don’t want to share their problems with many people
D．the trend that women can live longer makes them more relaxed
66．This passage mainly talks about _____.
A．why people should develop friendship
B．when friendship affects people’s health
C．people’s different attitudes towards friendship
D．the friendship which can make people live longer
=m1
+m2
是入射小球不发生碰撞时飞出的水平距离，
是被碰小球飞出的水平距离，
是入射小球碰撞后飞出的水平距离.由于它们都是从同一高度做平抛运动，运动的时间相同，故可以用水平位移代表水平速度，则应有m1