预制钢筋混凝土管片安装，定额的工作内容不包括（） A.管片吊运 B.安装连接栓 C.

特别指定提示期间

请将下列文件分别组合成三至四个案卷，并拟制案卷标题：

（1）利华公司2003年2月份经理会议记录；

（2）利华公司2003年销售计划；

（2）市工商局关于年检工作的通知；

（3）利华公司致香港凯福公司关于合作事宜的函；

（5）利华公司4月份经理会议记录；

（6）市物价局关于物价检查的通知；

（7）香港凯福公司关于合作事宜给利华公司的复函；

（8）利华公司2003年6月份经理会议记录；

（9）利华公司与香港凯福公司会议纪要；

（10）利华公司2003年8月份经理会议记录；

（11）市税务局关于税务自查的通知；

（12）利华公司2003年销售工作总结。

阅读理解

     If you have ever been rock climbing, you will know that it is not a very easy sport. In fact, you probably felt quite defeated when you first tried to do any serious climbing. Indoor and outdoor rock climbing are

both extremely demanding and require practice to get good at. It is one of the most physically and mentally demanding sports.

     There are three basic types of rock climbing. Top roping is the most common type and the climber

need to climb with a partner. The second type, which is very similar to top roping, is called lead climbing.

In both of the types, the climber can sit off the wall and rest on the rope. The third type is called

bouldering. Bouldering is a type of free climbing without any ropes. This is the most demanding of all

climbing types. The climber must be able to complete the climbing without taking a rest on the rope.

     Believe it or not, climbing is said to be about 75% legs and only 25% arms. To climb efficiently and

successfully, a person needs to have a wonderful technique. One of the major rules of rock climbing is to

always have three points touching the wall, whether it is both feet and one hand, or one foot and both

hands, as it is much easier to have your weight rest on three points than on two. Another important idea to grasp is that your arms in most cases will do the climbing; they only hold you into the wall so that your

legs are actually pushing you upward. Also, the closer you are to the wall, the easier it is to climb.

     Rock climbing may sound a bit too extreme for the everyday person, but it is really an amazing

workout. Once you get into the sport, and learn how to position your body and rest your weight, then you can begin to deal with some difficult problems. The great thing about rock climbing is that it is mentally

challenging as well. You are constantly analyzing the way your body moves and how to do certain moves

on the wall. For anyone who wants to get into shape, rock climbing is a fun and effective way to exercise muscles.

1. What does the author think of rock climbing?

A. It is an easy sport.  

B. It is challenging.

C. It is quite dangerous.  

D. It is extremely difficult.

2. From the text we know that _____________.

A. indoor rock climbing is much easier than outdoor rock climbing

B. while rock climbing, people depend mainly on their arms

C. ordinary people can practise rock climbing

D. during climbing, the climber can always stop for a rest

3. While climbing, it is much easier for a rock climber if he __________.

A. takes a rope                      

B. has a partner

C. has three points touching the wall  

D. uses feet more often

4. __________ will make rock climb easier.

A. Keeping the body closer to the wall

B. Resting more often on the arms

C. Resting more often on the feet

D. Pushing forward without thinking of the problems

5. By rock climbing, one can _______.

A. get more weight and stronger muscles  

B. get both physical and mental exercises

C. have a terrible experience that will last long  

D. probably feel quite defeated

油底壳的作用是封闭曲轴箱，防止（）进入机体内。

A、空气

B、柴油

C、脏物

双球阀的动力传动方式为（）

A.磁动

B.液动

C.气动

D.电动