问题
选择题
关于G=mg几位学生进行了如下分析，其中正确的是[ ]
A、物体的重力是质量的9.8倍
B、物体的重力和g成正比
C、物体的重力和它的质量m成正比
D、当公式变形为m=
时，物体的质量m与g在反比
答案
答案：C
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关于G=mg几位学生进行了如下分析，其中正确的是[ ]
A、物体的重力是质量的9.8倍
B、物体的重力和g成正比
C、物体的重力和它的质量m成正比
D、当公式变形为m=时，物体的质量m与g在反比
答案：C
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| It's necessary to talk about the most important thing-food. If we want to be l , we must have enough food. It must be clean food which is well 2 , and it must be the right kind of food. Many people have enough food. We know we 3 food when we feel hungry. Then, if we eat a bowl of rice, we will not feel hungry. 4 of us have enough food to eat. 5 have we eaten the right kind of food? Bread is good for us. It 6 us to work and study. It keeps us 7 when the weather is cold. But if we do not eat other food, we will become 8 . Meat, eggs and milk are all very good for us. They help us to 9 . They keep us healthy. We must have some of these kinds of food every day. We must also have 10 and vegetables. They are good for us, too. | ||||
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