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hangtreo
2 năm trước
b. Tính khối lượng bằng gam của các nguyên tử sau: Sodium ( Na = 23 đvC) Calcium ( Ca = 40 đvC) Chỉ mình cách tính với , mình bấm máy tính nó cứ ra 0
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2.TRANSFORMATION 1. He is strong. He can carry the box.  He is ________________________________________________________________. 2. The weather isn’t warm. We couldn’t go swimming.  The weather isn’t _______________________________________________________. 3. His father is very poor. He can’t buy a big house.  His father doesn’t have ____________________________________________________. 4. The weather is very cold. They can’t have a picnic.  The weather isn’t_____________________________________________________________. 5. This exercise is too difficult. He can’t do it.  This exercise isn’t__________________________________________________________. 6. I am very lucky because I have many good friends.  I am lucky_________________________________________________________________. 7. The table is too heavy. The boy can’t lift it.  The bag isn’t ______________________________________________________________. 8. The ceiling is too high. I can’t reach it.  I am not___________________________________________________________________. 9. The book was so interesting that I read it twice.  The book was_______________________________________________________________. 10. The essay is too long. He can’t finish it in 15 minutes.  He doesn’t have _____________________________________________________________.

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