先通读下面的短文，然后根据短文内容和所给首字母，在空格内填入一个适当的词，使短文意思完整。
M 1 friends is a skill like other skills. It improves with practice. If you want to meet people and make friends, you must be willing to take some a 2 .
You must first go where there are many people. You won’t make friends staying at home. Join a club or a party, talking with those who like the s 3 things as you do. Or join someone in some a 4 .
It’s human nature to feel a bit u 5 about the unknown. Most of our fears come from doubts about o 6 . Don’t forget they must be feeling the same way. Try to accept yourself as you are, and try to put the other person at ease（自由自在）. You’ll b 7 feel comfortable.
Try to act self-confidently t 8 you don’t feel that way. When you enter a room f 9 of strangers, walk tall and straight, look directly at them and smile. Meeting someone new doesn’t mean that you will make friends because friendship is based on mutual liking（基于互相喜欢） and “give and take”. It takes t 10 to develop.
所决定的平面内，在平行于y轴的虚线MN右侧、y>0的区域存在着沿y轴负方向的匀强电场；在y<0的某 区域存在方向垂直于坐标平面的圆形有界匀强磁场（图中未画出）。现有一电荷量为
、质量为
的带正电粒子从虚线MN上的P处，以平行于
轴方向的初速度
射人电场，并恰好从原点
处射出，射出时速度方向与
）处，且射出时速度方向沿
两点间的电势差。
表示） 
