问题
选择题
在医院病房外就能闻到特殊气味，这说明（ ）
A．分子质量很小
B．分子是可分的
C．分子间有间隔
D．分子是不断运动的
答案
在医院病房外就会闻到特殊气味，是因为药物中含有特殊气味的分子运动到了空气中，进入鼻子中的缘故．说明了分子在不断地运动，和分子小，分子可分、分子间有间隔没有直接关系．
故选D．
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在医院病房外就能闻到特殊气味，这说明（ ）
A．分子质量很小
B．分子是可分的
C．分子间有间隔
D．分子是不断运动的
在医院病房外就会闻到特殊气味，是因为药物中含有特殊气味的分子运动到了空气中，进入鼻子中的缘故．说明了分子在不断地运动，和分子小，分子可分、分子间有间隔没有直接关系．
故选D．
| 阅读短文，从各题所给的四个选项中,选出 一个正确答案。 | ||||
| Paul received an expensive car from his brother as a Christmas present. On Christmas Eve Paul saw a dirty and poorly-dressed boy walking 1 his shining car. "Is this your car, sir?" he asked. Paul told him how he got the car and the boy was 2 . "You mean your brother gave it to you and it didn't cost you anything? Boy, I wish..." he said, without 3 his sentence. Paul thought the boy wished he had a 4 like that. But what the boy said surprised Paul greatly. "I wish," the boy went on, "that I could be a brother like that. " Paul looked at the boy in surprise. He invited him to take a 5 in his car and the boy agreed happily. After a short ride, the boy turned and with his eyes 6 , said, "Sir, would you mind driving in front of my house?" Paul smiled a little. He thought the boy wanted to 7 his neighbors that he could ride home in a big car. But Paul was wrong 8 . The boy ran back into his house, and after a short while came back with his disabled brother in his arms. He 9 him down on the step and pointed to the car. "There he is, buddy, just like what I told you upstairs. His brother gave it to him for Christmas and it didn't 10 him a cent. Some day I'm going to give you one just like it. " | ||||
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