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quanvn1810
2 năm trước
Nitơ trong thiên nhiên là hỗn hợp gồm hai đồng vị là 14,7N (99,63%) và 15,7N (0,37(%) Tính nguyên tử khối trung bình của nitơ !
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Use a verb in column A with an adverb particle in B to form a phrasal verb and fill in each sentence. Each verb can be used only once. There are two extras in each column. A B get, take, come, break, look, into, out, through, of, to, down, off, for, up, round let, sit, account, run, listen 31 Linna’s new book is due to ______________________ next month. I wonder what the critics will think of it. 32 Scientists are mystified by the sudden rise in global temperature. They are unable to ______________________ it. 33 I don't want my colleagues to ______________ wind _____________ the fact that I'm leaving. 34 John works in that office. I quite often ______________________ him in the streets round here. 35 Kate has a very pleasant manner. I’m sure the children will ____________________ her at once. 36 Although the students ______________________ the entire lecture, none of them is really paying attention to it. 37 The schools will ______________________ next week. It's almost holiday time. 38 Brian's parents have high expectations of him and he is determined not to ______________ them chính xác hộ ạ

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