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dieuhuong184.t
2 năm trước
Rót 44,28ml nước vào cốc đựng sẵn m gam na2co3.10h2o khuấy cho muối tan hết thu được dung dịch Na2CO3 4,3%. khối lượng m là
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1. We are keeping you here for your own _______________ (safe) 2. Is that ladder _____________ ? (safety) 3. When did ________________ come to this village ? (electric) 4. Electricity can cause serious __________________ to people . (injure) 5. The boy _________________ himself by playing with a knife (injury) 6. It’s not ______________ to wear short skirts to church (suit) 7. Every year fire brings ___________ to a lot of families and injures children . (destroy) 8. It is ____________ to leave medicine around the house . (safe) 9. They arrived home _____________ after a long distance journey . (safe) 10. These thin clothes are ________________ for hot weather . (suit) 11. Many people are very concerned about the _____________ of the rainforest. (destroy) 12. Let's have an ________________ mend the washing machine. (electric) 13. Our village was ________________ three years ago. (electrical) 14. My father always does things __________________ . (safe) 15. Heat gradually ________________ Vitamin C (destructive) 16. Don’t leave the light on. It waste ______________ (electric) 17. Every year, factories release thousands of tons of poisonous _________________ . (chemistry) into the atmosphere . 18. Kitchen is an ________________ place to play (suit) 19. I go to school by ____________ bike (electrify) 20. The _______________ victims were sent to the hospital (injure)

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