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tuandangaace
2 năm trước
Phân loại ( Oxit, Axit, Bazơ, Muối ) và gọi tên các chất có công thức sau: K2O, Al2O3, ZnSO4, P2O5, KOH, SO3, H3PO4, Fe(OH)2, HNO3, AlCl3, Fe2(SO4)3, CaO, H2SO4, Al(OH)3, Cu(NO3)2.
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Các câu hỏi liên quan

I. Fill in each blank with ONE appropriate word. 1.Don’t say unkind things to her – she’s very ……………………………………………………….. 2.William never stops ………………………………………………… in class. He’s very talkative. 3.I am in class 6A1. Nam is in class 6A1, too. We are ……………………………………………… 4.Linh starts her classes at 2 o’clock in the afternoon and ………………………..…. them at 4:30. 5.His father works in the hospital, he works …………………………………………….…. all day. 6.Lan ‘s classroom is on the first …………………………………………….It’s very big and nice. 7.My cousin goes to a……………………………….school, so she only comes home at weekends. 8.Jim is always sure of his own abilities. He’s so …………………………………………………... 9.My best friend Matt is really sporty. He ………… badminton, basketball and football very well. 10. My sister is very curious. She wants to know ……………………………………………………! II. Write the correct form or tense of the verbs in brackets. 1.Just a minute, I can’t hear you. I ………………………………..……………. (listen) to the radio. 2.Susan often ………… (drive) to the beach when the weather ……..…………………… (be) nice. 3.It ……………………………………..…(snow) quite hard – perhaps we shouldn’t go out tonight. 4.The students …………………………………….(not prepare) for the science exam at the moment. 5.How often ……………………………………………………… (you/ go) to the gym to work out? 6.Every day his father often……………….……… (go) to work at seven o’clock by his motorbike. 7.The teacher …………….( read ) the dialogue at the moment and we ………….……(listen) to him. 8.There……………………………………..………………. (be) twenty classrooms in Hoa’s school . 9.Lien..………….. (not play) chess but she …………( play) volleyball with her friends on Sunday. 10.Where ………………..…….. ( be ) Mai ? – She ( play ) ………………….……….. in the garden.

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