Không dùng thêm thuốc thử, bằng phương pháp hóa học, hãy phân biệt 6 dung dịch không màu sau đựng riêng biệt trong các bình mất nhãn: MgCl2, NaHCO3, NaHSO4, BaCl2, NaCl và NaOH.

Giúp em nhanh vs ạ đang kiểm tra ạ

8. Those aren't my brothers' dogs . their dogs are big , small 9. what is your name ? - I am Alan . 10. My son told me that I need to stop smoking dịch tiếng việt

ai làm hộ em từ câu 31 đến40 với ạ đề bài là viết lại câu với 1 trong các từ where ,which,who,whom,that,whose 7h em cần mong mọi người giúp nhanh ạ

chỉ ra biện pháp nghệ thuật được sử dụng trong ba khổ thơ sau lặng im bên bếp lửa cho đến Bác nhón chân nhẹ nhàng

số các ước của 100 là A, 8 B, 9 C, 10 D 20

Thầy cô giúp giùm e bài này với ạ

10/ Scientists have spent years . ………………..information about UFOs. ( collect ) 11/ This product is commercially acceptable, but ……………….. inacceptable. ( educate ) 12/ The evening was ……………… spent talking and dancing. ( enjoy ) 13/ Vo Thi Sau and Nguyen Thi Minh Khai are ……………….. who are much loved and respected by their people for their courage and great qualities. ( hero ) 14/ Please stand at the ………………… to the museum. I’ll be there in 5 minutes. ( enter ) 15/ We ………………. go out for dinner but we cook our meal most of the time. ( occasion ) 16/ Peter’s opinion wasn’t practical so we were in ………………. with him. ( agree ) 17/ My father has a large ………………. of coins. ( collect ) 18/ Mary had no ………………… getting up early in the morning. ( difficult ) 19/ He tried to make his speech more ………………… ( entertain ) 20/ This athlete has had …………………... achievements. ( admire )

3/ When hearing the alarm, I ……………… got up and dressed. ( hurry ) 4/ I gladly accepted their ……………… to open the festival. ( invite ) 5/ Our friends are very interested in visiting some ………………. resort. ( mountain ) 6/ The ……………… have to move away because of a huge storm. ( village ) 7/ There is a …………….. lot near my house. ( park ) 8/ First prize is five days of ………………. in a top health spa. ( relax ) 9/ Jean cloth was made .………………..from cotton. ( complete )

CMR x^2+y^2=(x+y)^2*(-2xy) (a+b)^2-(a-b)*(a+b)=2b*(a+b)