Tính : 1) sin 27 - cos 63 2) $\frac{tan 31 . tan 59}{cot 16 . cot 74}$ 3) sin 15 + sin 20 - cos 70 - cos 75

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chuyên đề thức giả định:( giúp mình vs mình đang cần gấp ạ) cảm ơn mng trc ạ câu1:My friend won't lend me his car. I wish . A:he lent me his car. B:he didn't lend me his car. C:he would lend me his car. D:he will lend me his car. cau2:my mother is not free today.I wish . A:my mother is free today. B:my mother won't be busy today. C:I had some money on me. D:I had got no money on me. cau3:I'm sorry I haven't got any monay on me.I wish . A:I have got no money on me. B:I have some money on me. C:I had some money on me.D:I had got no money on me. cau4:I'm afraid our team will lose the game today.I wish . A:our team won the game today. B:our team would win the game today. C:oue team didn't lose the game today. D:our team had won the game today. cau5:my friends didn't take part in the game.I wish . A:my friends took part in the game. B:my friends had taken partin the game. C:my friends would take part in the game. D:my friends did take part in the game. cau6:It wasn't fine yesterday.I wish . A:it was fine yesterday. B:it would fine yesterday. C:it will fine yesterday. D:it had been fine yesterday. cau7:Mrs white always talks to her baby as though he an adult. A:is. B:were. C:had been. D:will be. cau8:when he came out of the room, he looked he had seen aghots. A:as. B:as though. C:when. D:if. cau9: susan's doctor insists for a few days. A:that she is resting. B:her resting . C:that she rest. D:her to rest. cau10:the doctor suggested that his patient . A:stop smoking. B:stops smoking. C:stoped smoking. D:to stop smoking. cau11:Lan didn't apply for the job in the library.she regretsit nơ. A:Lan wishes she had applied for the job in the library. B:Lan wishes she hadn't applied for the job in the library. C:Lan wishes she would apply for the job in the library. D:Lan wishes she applies for the job in the library. cau12:Maria says she'd like to have been put in a higher class. A:Maria wishes that she will be put in a higher class. B:Maria wishes that she is put in a higher class. C:Maria wishes that she had been put in a higher class. D:Maria wishes that she were put in a higher class. cau13:he broke up with up with her but now he thinks that was a mistake. A:he wishes he hadn't broken up with her. B:he wishes not to have broken her up. C:he regrets having not broken up with her. D:he was mistaken with breaking up with her. cau14:I regret not going to the airport to see her off. A:I wish I had gone to the airport to see heroff. B:If only I would go to the ariport to see her off. C:I regret to go to the ariport to see her off. D:If I were you,I would go to the airport to see her off. cau15:It's such a pity my mother can't attend my birthday party. A:If only my mother could attend my birthday party. B:If only my mother had attended my birthday party. C:I am very sorry that my mother didn't attend my brithday party. D:I wonder why my mother can't attend my brithday party. cau16:It is a pity that I can't speak english as native spraker. A:I wish I could speak english as a native speaker. B:I wish I couldn't speak english as a native speaker. C:I wish I can speak english as a native speaker. D::I wish I have spoken english as a native speaker. cau17: his parents are away on holiday.He really needs their help now. A:as long as his parents are at home, they will be able to help him. B: he wishes his parents are at home and could help him now. C:If his parents are at home, they can help him now. D:If only his parents had been at home and could have helped him.

Câu 11: Đồ ăn nào dưới đây chứa nhiều chất béo nhất ? A. Gạo. B. Bơ. C. Hoa quả. D. Khoai lang. Câu 12: Thức ăn được phân làm bao nhiêu nhóm? A. 2 B. 3 C. 4 D. 5 Câu 13: Việc phân nhóm thức ăn không bao gồm nhóm nào ? A. Nhóm giàu chất béo B. Nhóm giàu chất xơ C. Nhóm giàu chất đường bột. D. Nhóm giàu chất đạm. Câu 14: Nguồn cung cấp của Vitamin C chủ yếu từ: A. Lòng đỏ trứng, tôm cua B. Rau quả tươi C. Thịt lợn, thịt gà, thịt vịt... D. Tất cả đều đúng Câu 15: Chức năng dinh dưỡng của chất béo là: A. Là dung môi hoà tan các vitamin B. Chuyển hóa một số vitamin cần thiết cho cơ thể C. Tăng sức đề kháng cho cơ thể. D. Tất cả đều đúng Câu 16: Chất dinh dưỡng nào là nguồn chủ yếu cung cấp năng lượng cho mọi hoạt động của cơ thể? A. Chất đường bột. B. Chất đạm. C. Chất béo. D. Vitamin. Câu 17: Vitamin nào sau đây giúp ngừa bệnh quáng gà? A. Vitamin A B. Vitamin B C. Vitamin C D. Vitamin K Câu 18: Bệnh suy dinh dưỡng làm cho cơ thể phát triển chậm, cơ bắp yếu ớt, bụng phình to, tóc mọc lưa thưa là do trẻ bị: A. Thừa chất đạm. B. Thiếu chất đường bột. C. Thiếu chất đạm trầm trọng. D. Thiếu chất béo. Câu 19: Loại thức phẩm nào cần ăn hạn chế nhất theo tháp dinh dưỡng cân đối? A. Muối. B. Đường. C. Dầu mỡ. D. Thịt. Câu 20: Chất giúp cho sự phát triển xương, hoạt động của cơ bắp, tổ chức hệ thần kinh, cấu tạo hồng cầu và sự chuyển hoá cơ thể là: A. Chất đường bột. B. Chất đạm. C. Chất béo. D. Chất khoáng. Giúp mik nha~