如图表示人体一个具体动作的情况，请认真观察并回答问题：

（1）图中所示的动作被称为______．

（2）若要完成图中示意的动作需要多块肌肉的协调参与．图中处于收缩状态的是______肌；而处于舒张状态的则是______肌．

（3）若要完成图中所示意的动作，需要肌肉收缩并牵引______绕______运动．

（4）当手自然下垂时，1与2所处的状态分别是舒张和______； 当手提重物时，1与2所处的状态分别是收缩和______．

此题要求改正所给短文中的错误。对标有题号的每一行作出判断：短文中有10处错误，每句中最多有两处。错误涉及一个单词的增加，删除或修改。

此行多一个词：把多余的词用斜线(＼)划掉。

此行缺一个词：在缺词处加一个漏字符号(∧)，在该行下边写出该加的词。

此行错一个词：在错的词下划一横线，在该行下边写出改正后的词。

注意：1.每处错误仅限1词；

2.只允许修改10处，多者（从第11处起）不计分。

There are different train ticket for people to choose from when traveled by train. They may want to buy a single ticket and a return ticket. A single ticket allows them enjoy more freedom at their destination while a return not only is cheaper but also save them the trouble of buying the ticket when they decide to return. Some people prefer hard seats to soft one. Young people like to have hard seats because enjoy the company of other passengers is what they need during a journey. Businessmen would not like to have soft seats. They want to have a good rest. When they get off the train, they were still energetic and can rapid go on to do their jobs.