题目

小聪和小明为了探究“温度和物质状态对同种物质密度的影响”．在一定的环境下将 1g 的冰加热， 分别记录其温度和体积的数据，利用描点法得到了如图所示的图像，则下列说法中正确的是（） A . 在 0℃时，冰块的密度比水大 B . 水结冰时，质量不变，体积变大 C . 当水从 0℃上升到 4℃的过程中，随着温度的升高，其密度逐渐增大 D . 小明和小聪的研究结果表明：密度是不会随着物质的状态而发生改变的阅读理解。     Have you ever been ill? When you are ill, you must be unhappy because your body becomes hot, and there are pains all over your body. You don't want to work and you have to stay in bed, and you will feel very sad.      What make us ill? They are germs. Germs are everywhere. They are very small and you can't find them with your eyes. But you can see them with a microscope (显微镜), we will see a lot of them in it. So your father and mother will not let you drink dirty water.      Germs are not only found in water. They are found in air and dust. If you get a cut in the finger, and if some of the dust from the floor goes into the cut, germs will come into your finger. Your finger will become big and red, and you will have much pain in it. Sometimes if the germs go into all of your body, you may have pain in every part of the body. 1. If ____, you may be ill now. [     ]A. you like to stay in bedB. your body becomes hot C. you feel cold in winter D. you feel hot after work 2. A microscope is used for _____. [     ]A. making very big things look much smallerB. making very small things look much biggerC. helping us read the newspapers easilyD. helping us when we are nearsighted (近视) 3. Germs can be found _____. [     ]A. everywhere around us B. only in our body C. only in dirty water D. only in a microscope 4. Which of the following statements is TRUE? [     ]A. If things are very small, they are germs. B. If things can't be seen, they must be germs. C. Germs are too small to see with our eyes. D. Your fingers may be cut by small germs. 5. The main idea of the passage is that _____. [     ]A. germs are in dirty water B. it's bad to be illC. you'd better take care of your fingers D. germs make us ill