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quangduong1912001
2 năm trước
Máy thứ nhất sản xuất 7 dụng cụ trong 42 phút 49 giây, máy thứ hai sản xuất 9 dụng cụ hết 58 phút 30 giây. Hỏi trung binh mỗi dụng cụ máy thứ hai làm chậm hơn máy thứ nhất bao nhiêu giây ? Bài giải Mn giúp vứi ạ, Thank you ❤
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Birds that feed in flocks commonly retire together into roots. The reasons for roosting commune are not always obvious, but there are some likely benefit In winter especially, it is important for birds to keep warmth at night and conserve precious food reserves. One way to do this is to find sheltered roost. Solitary roosters shelter in dense vegetation and enter a cavity- horned larks dig holes in the ground and ptarmigan burrow into snow banks- but the effect of shelter is magnified by several birds huddling together in the roost, as wrens, swifts, brown creepers, bluebirds, and anis can. Body contact reduces the surface area exposed to the cold air, so the birds keep each other warm. Two kinglets huddling together was found to reduce their heat losses with a quarter and three together saved a third of their heat. Mọi người tìm cho mình 10 lỗi sai trong bài này và giải thích lí do vì sao sửa như thế nhé hứa 5*+ctlhn

Giúp mk nha. Cảm ơn trước. Hứa vote 5* ctlhn I.Tìm lỗi sai 1. Thank you very much for a letter which arrived a few days ago. Từ gạch chân: A. you B. for C. a letter D. a few 2. The clerk said that money can pay at the check-out if I wanted to Từ gạch chân: A. said B. money C. can pay D. wanted 3. The room isn’t too large for them to put all the furniture into Từ gạch chân: A. too large B. them C. to put D. the furniture 4. Has your mother have a man repair the roof of the house? Từ gạch chân: A. have B. a C. repair D. the II. Chia động từ và viết dạng đúng của từ 1. I...........(just/meet) Ann's husband. I met him at a party last night 2. All the students have finished (paint).........the pictures so far 3. The candidates listed below have failed to satisfy the............(examine) 4. Our visit Ha Long Bay was great. It was such a..............experience. (forget) 5. He got weaker after he was operated...............(success) 6. What is the correct...........of this word? (pronounce) III. Viết lại câu với nghĩa không đổi 1. They have already finished the homework ->The homework 2. "Are you going ti visit your aunt tomorrow?" Tom asked ->Tom asked 3. It is years since we decorated the room ->We haven't 4. Barbara is the best tennis player in the club ->No one 5. Though he was sick, he went to work all day ->Despite

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