如图是关节模式图，据图回答：

图中1是____ ，2是____ ；二者相对的面上有一层3，这是____ ，具有减少____ ，缓冲____ 的作用，属于____ 组织；4是____ ，由____ 组织构成；5是____ ，内有少量____ ，是由____ 分泌的．另外，关节囊外还有____ ．由图可以看出，关节结构具有既____ 又____ 的特点．

My friend Jack always had accidents. He did not1 attention to what he was doing or where he was going.

 A few months ago, 2car hit him while he was on his way home from school. The driver was tired,3 he did not see Jack. And Jack was talking on4 mobile phone and was riding in the middle of the road. The car hit him. He 5 his leg and was in hospital for over a month.

  Last week, he was not looking 6 he was going as usually. As a result, he fell into a hole 7the park. Some 8people in the park helped him climb out of the hole and then took him to hospital. 9 he did not break an arm or a leg this time. At the hospital, the 10 gave him some medicine and then he went home.

  After the two accidents, Jack changed a lot. Now he is very careful.

社会主义建设道路的探索注定是一个曲折的过程。