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问题 选择题

下列各种说法中不正确的是（　　）

A．在水中氢、氧原子间均以共价键相结合

B．离子键是阳离子、阴离子的静电作用

C．H2和Cl2的反应过程涉及了共价键的断裂和形成

D．金属具有金属光泽及良好的导电性和导热性，这些性质均与金属键有关

答案

答案：A

填空题

在一个三角形中，有两个角分别是25。和65。，这是一个（  ）三角形。
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单项选择题 案例分析题

Once there was a little girl who came to live in an orphanage (孤儿院). As Christmas time was drawing near, all of the other children 11 telling the little girl about the beautiful Christmas tree that would appear in the hall downstairs on Christmas morning. After their usual 12 , each child would be given their only Christmas gift, a small orange.

The headmaster of the orphanage was very 13 with the kids. So on Christmas Eve, when he 14 the little girl slipping down the stairs to peek（偷看）at the much-heard-of Christmas tree, he 15 that the little girl would not receive her Christmas orange because she had been so curious as to disobey the rules. The little girl ran back to her room 16 , crying at her terrible fate. The next morning as the other children were going down for breakfast, the little girl stayed in her bed. She couldn’t 17 the thought of seeing the others receive their gift while there would be 18 for her. Later, as the children came back upstairs, the little girl was surprised to be handed a napkin (餐巾). As she carefully opened it, there, to her 19 , was an orange all peeled and sectioned (分瓣). “ How could this be? ” she asked. Then, she realized how each child had taken one section from their orange for her so that she, too , would have a Christmas orange. What an example of the true meaning of Christmas those orphan children showed that morning! How I 20 the world would show the same kind of concern for others, not only at Christmas, but throughout the year!

请在15处填上正确答案（）

A.noticed

B.declared

C.explained

D.doubted
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