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phamnga.201072
2 năm trước
Mỗi lần tim đập tim thực hiện một công để đưa 60 g máu di chuyển trong cơ thể để lên độ cao trung bình là 40 cm cho biết tim đập trung bình 72 lần mỗi phút tính công do tim thực hiện trong một min và công suất trung bình của tim khi hoạt động
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Energy is one of the problems that many people are interested in. It is not an unfamiliar word. It is heard, said, discussed day after day. It is close to everyone’s daily life. You turn on a lamp and it is energy that gives you light. You turn on a TV and it is energy that gives you pictures and sound. You ride a motorcycle and it is energy that gives you movement. You cook your meals and it is energy that gives you heat to boil rice. The problem is that the demand for energy is rising and that the price of energy is getting higher and higher. The supply of energy on earth is limited. It cannot provide us forever. The shortage of energy in the future is inevitable. Therefore, saving energy is a must if we want to continue to live in a safe and sound world. * Notice: familiar: thân thuộc demand: nhu cầu inevitable: chắc chắn xảy ra Statements True False 1. Many people aren’t interested in the problems of energy. 2. The word “energy” is familiar and close to everyone’s daily life. 3. Energy is heard, said, discussed day after day. 4. You turn on a lamp and it is energy that gives you light. 5. You ride a motorcycle and it is energy that gives you movement. 6. We can’t watch TV without energy 7. The supply of energy on earth is unlimited. It can provide us forever. 8. If we want to continue to live in a safe and sound world, we have to save energy.

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