问题
填空题
发生碱-集反应必须具备以下三个条件：一是（），二是（），三是（）。
答案
参考答案：混凝土中的集料具有活性，混凝土中含有一定量的可溶碱，有一定的湿度
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发生碱-集反应必须具备以下三个条件：一是（），二是（），三是（）。
参考答案：混凝土中的集料具有活性，混凝土中含有一定量的可溶碱，有一定的湿度
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| It is Saturday morning. We don't go to 1 . Lily and Lucy go to 2 Uncle Wang this morning. The old 3 house is near the river. They can see some boats on the river. Uncle Wang is glad to meet the two girls. He 4 them some apples and pears. Now he is making a kite for 5 . His kites are good and the 6 like them. Lily and Lucy like 7 kites. Look, the kite is high in the sky now 8 they're very happy. They 9 Uncle Wang and go 10 with the kite. | ||||
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