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九（1）班全体同学根据自己的爱好参加了六个兴趣小组（每个学生必须参加且只参加一个），为了了解学生参加兴趣小组的情况，班主任参加各个兴趣小组的人数进行了统计，绘制成了如图不完整的扇形统计图，已知参加“足球”小组的学生有7人，请解答下列问题： （1）九（1）班共有名学生； （2）若该班参加“吉他”小组与“街舞”小组的人数相同，请你计算，“吉他”小组对应扇形的圆心角的度数； （3）若“足球”兴趣小组7个同学编号为1，2阅读理解。      There is a place on our earth where hot water and steam (蒸汽) come up from under the ground. It is a large island in the Pacific. The island is North Island, in New Zealand.     The planet on which we live is a ball of very hot rock.  It is a good thing for us that the outside shell(壳)  is cold. If it were not, no one could live here. What if our earth were only as big as an egg? Then the outside part would be as thin.as the egg's shell.     The earth's shell has cracks in it in some places. In New Zealand this shell seems to have more cracks than in other places on the earth. There are places where the ground is so hot that it burns your feet.  In some places, hot water shoots (喷射)  into the air from time to time. In other places, you can see steam coming up from pools of hot water.      In those places people make use of the heat that comes from inside the earth. Some of them cook in the hot pools.  They put food into a basket and place it in the water. Washing clothes is done in much the same way.     Many people bring the hot water from below the earth into their homes. They do this by putting a long pipe into the ground. In this way, they get hot water and steam for cooking and washing, and for heating their homes.     For most of us, the heat under our feet is too far away to use. The people who get heat. from inside the earth are lucky. They don't have to pay for the heat they use.1. North Island is a large island in the ocean _____.2. The underlined word "cracks" in the passage means "_____" in Chinese. A. 裂缝 B. 凹凸 C. 筒子3. Which of the foUowing is TRUE according to the passage?A. Our earth is a big ball of very hot rock outside.B. There is so much hot water coming up from the under ground that we have to take an umbrella.C. The people in North Island use heat from inside the earth for free.4. People can't use hot water and steam from under the ground for _____. A. cooking and washing B. hearing their homes C. dnnking5. The best title of the passage is  _____.A. What's inside the Earth B. Heat under Your Feet C. A Rock in New Zealand