题目内容
简述课外小组活动的特点和组织。
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某公路山岭隧道，长度为2000m；穿越的岩层主要是坚硬岩，岩体较完整，块状或厚层状结构；采用新奥法钻爆施工。两洞口处由于岩层较破碎设有明洞，进口明洞长10m，出口明洞长8m；两洞门采用端墙式洞门。 根据此案例场景，回答下列问题： 该隧道施工在辅以大型机具设备时宜采用( )施工。
教学过程具有哪些基本特点
根据下面短文回答下列问题。 Big Ben is not only a name of a man. It is also the name of a big clock in London. London is the capital of England. This clock has four faces. So, no matter where you stand, you can read the time on the face of Big Ben. Each face is the size of a bus. The hands are about four meters long. If you go to London, you may want to visit the House of Parliament. You will probably hear it and see it. The big clock makes such a loud noise. "Dingdong, dingdong." It goes every quarter of an hour. The name of Big Ben comes from a great builder. This man did much building work in London many years ago. The clock strikes(敲；打) every ______ of an hour.
根据下面短文回答下列问题。 People are busy working every day, so they do not have enough time to do exercises. As a result(结果), many people become too fat or too thin. To keep our bodies healthy, we have to do exercises every day. There are many kinds of exercises. Bending(弯腰) and stretching(伸展) helps us move easily. Before we play ball games or swim, it is better for us to do bending and stretching exercises first. This kind of exercise is sometimes called warm-up exercise. Running is also a good exercise. If we cannot run fast, we can jog. Jogging means running slowly. Again, before we run or jog, we must do warm-up exercises. Also, we should not run or jog in busy streets. The air there is often dirty. Some people like weight lifting(举重) because it can make their bodies strong. Also, we need to do some warm-up exercises before weight lifting. ______ is called warm-up exercises.
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