题目列表(包括答案和解析)
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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 riot, 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.
71.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.
72.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
73.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
74. 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
75. 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
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I am always eager to do experiments, especially chemistry ones. It's _26_ to work with test tubes and beakers(烧杯) , even though sometimes my efforts end in__27___. Experiments were fun for me __28 a recent accident.
The 29 happened when I was heating a big test tube with an alcohol burner(酒精灯) , chatting to my partner while waiting for__30____ changes. All of a sudden, the tube cracked. Even though I jumped from my seat when I heard the crack, the hair on my forehead was __31____ as I was leaning too close to the test tube.
__32___ I had no time to be sad about my hair: the liquid in the test tube poured onto the table and caught fire. I'd never 33 _ anything so bad! My___34___went blank (空白)for a moment. Then I quickly covered the fire with a damp cloth to__35____.
The teacher told me that the test tube broke in half at the bottom because we didn't dry it properly before __36___ it.
We calmed down and did the experiment, again. But our hearts were still __37____ rapidly even after we walked out of the lab.
But my bad __38___ didn't end there! Since all __39 was focused on the flames while we were in the lab, I didn't see the liquid falling onto my trousers.
During the following class, I felt a __40___ in my leg. Soon it became more and more painful and I touched the area with my fingers, _41_ to make things better. But to my great 42___ , the material of my trousers turned into powder! “Vitrio(硫酸)! ! !”The terrible word came into my mind. I rushed out right away to wash and examine my poor skin. _43_ , it was not a serious injury.
After changing my __44____I sat down and told myself: danger is no joke! It's very important to have a serious___45___ in chemistry class. Doing scientific experiments as a learner is no laughing matter.
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