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第3部分：概括大意与完成句子(第23～30题，每 题1分，共8分) 下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第2～5段每段1选择个最佳标题;(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。 Teach Your Child Science 1 It is important to make your child interested in science from an early age. Most young children ask a lot of questions and you should give careful scientific answers. Dont only give facts， but try to give explanations as well. 2 Science is not just knowledge; it is a way of thinking， a method of finding out about the world. We see something. We try to explain it， and we test our idea by setting up an experiment. One day you come home and find the plant on the table has fallen over. You think it might be the wind from the open window or the cat， so you close the window， but leave the cat in and see what happens (you can also try leaving the window open and shutting the cat out)。 Of course， you remember there may be a third explanation. 3 Ask your child to get a piece of string， some salt， a glass of water and an ice cube (冰块)。 Tell her to put the ice in the water， and then put one end of the string on the ice， leaving the other end over the side of the glass. Put a little salt on the ice. Wait a minute， and then pull the string; it should be attached to the ice. Ask the child： what has happened? | 
