quả cầu nặng 0,2kg được treo vào sợi dây cố định hãy biểu diễn các vectơ lực tác dụng lên quả cầu .Chọn tỉ xích 1N ứng vs 1cm.

31. My mother took me to the zoo yesterday

…………………………………………………………………………….

32. Blair invented a color television in 1928.

…………………………………………………………………………….

33. John gave me these records last week.

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34. Our club holds meetings once a month.

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35. She doesn’t find anything in that box.

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Choose the best answer.

We are looking for ____ place to spend ____ night.

Choose the best answer.

Please turn off ___ lights when you leave ___ room.

Choose the best answer.

I like _____ colorful costumes of ____ ethnic minority people in Vietnam.