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nguyentramykaneki
2 năm trước
Một vật có khối lượng 200kg. a, Tính trọng lượng của vật b, Nếu kéo vật lên cao theo phương thẳng đứng thì lực kéo =? c, Nếu kéo vật bằng hệ thống pa lăng 2 ròng rọc động, 2 ròng rọc cố định thì lực kéo =? d, Nếu kéo vật bằng mặt phẳng nghiêng dài 10m cao 4m thì lực kéo =?
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Supply suitable tense of the verb in the brackets then turn into interrogative and negative. 7. They (go)________________________________ to the movie tonight. ____________________________________________________________________ ____________________________________________________________________ 8. We (meet) ________________________________ our friends tonight. ____________________________________________________________________ ____________________________________________________________________ 9. Our friends (watch) __________ a game on TV at the moment. ____________________________________________________________________ ____________________________________________________________________ 10. My mother __________________________ (listen) to music at present. ____________________________________________________________________ ____________________________________________________________________ 11. Mai (play) ___________________________________ badminton now. ____________________________________________________________________ ____________________________________________________________________ 12. Lan (make)__________________________________ a dress for herself now. ____________________________________________________________________ Mọi người nhớ đặt câu phủ định và nghi vấn giúp em với em phải nộp bài gấp

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