下列现象中，不能用分子动理论来解释的是（ ）
A．白糖放入杯中，杯中的水会变甜
B．大风吹起时，地上的尘土飞扬
C．一滴红墨水滴入一杯水中，过一会杯中的水变成了红色
D．把两块纯净的铅块用力压紧，两块铅合在了一起
A、白糖加入热水中，水变甜．说明糖分子在永不停息的做无规则运动．故A正确．
B、大风吹起时，地上的尘土飞扬，是物体在运动，属于机械运动．故B错误．
C、一滴红墨水滴入一杯水中，过一会杯中的水变成了红色，分子在永不停息的做无规则运动，故C正确．
D、把两块纯净的铅块用力压紧后，两个铅块的底面分子之间的距离比较大，表现为引力，使两个铅块结合在一起，用一定的拉力才能拉开．故D正确．
故选B．
| 阅读理解。 |
| It was Jimmy's birthday, and he was five years old. He got a lot of nice birthday presents from his family, and one of them was a beautiful drum (鼓). "Who gave him that thing?" Jimmy's father said when he saw it. "His grandfather did," answered Jimmy's mother. Jimmy liked his drum very much. He made a terrible (可怕的) noise with it, but his father didn't mind (介意). He was working during the day and Jimmy was already in bed when he got home in the evening, so he couldn't hear the noise. But one of the neighbors (邻居) didn't like the noise at all, so a few days later, she took a sharp (锋利的) knife and went to Jimmy's house while he was hitting his drum. She said to him, "Hello, Jimmy, there is something very nice inside your drum. Here is a knife. Open the drum and let's find it." |
| 1. Jimmy got a lot of nice presents from his ______. |
[ ] |
| A. classmates B. friends C. teachers D. family |
| 2. Who gave Jimmy the drum?______. |
[ ] |
| A. His father B. His mother C. His neighbor D. His grandfather |
| 3. Why didn't Jimmy's father stop him from making noise with the drum? Because ______. |
[ ] |
| A. he liked Jimmy very much B. he didn't hear it C. Jimmy was in bed D. Jimmy only played in the evening |
| 4. One of the neighbors ______. |
[ ] |
| A. liked Jimmy very much B. enjoyed listening to the sound of the drum C. wanted to show Jimmy a sharp knife D. didn't like the noise at all |
| 5. What did Jimmy's neighbor really want him to do? To ______. |
[ ] |
| A. stop him making noises B. make a noise on his drum with a knife C. show him how to hit the drum D. find something nice in his drum |