Giải theo cách lớp 8 hộ mình ,tks 😍

rút gọn tính toán ai giúp tui với help help

Nêu qui tắc cộng véc tơ n điểm.

Câu 1: Cho những oxit sau: SO2, K2O, CaO, N2O5, P2O5, BaO. Dãy gồm những oxit tác dụng với H2O, tạo ra bazơ là: A. SO2, CaO, K2O B. K2O, N2O5, P2O5 C. CaO, K2O, BaO D. K2O, SO2, P2O5 Câu 2: Những oxit sau: CaO, SO2, Fe2O3, Na2O, CO2, P2O5. Dãy gồm nhưungx oxit tác dụng với nước tạo ra axit là: A. CaO, SO2, Fe2O3 B. SO2, Na2O, CaO C. SO2, CO2, P2O5 D. CO2, Fe2O3, P2O5 Câu 3: Cho các bazơ sau: LiOH, NaOH, KOH, Ca(OH)2, Mg(OH)2, Al(OH)3, Fe(OH)3. Dãy bazơ tan trong nước tạo thành dung dịch kiềm là: A. Ca(OH)2, LiOH, Cu(OH)2, Mg(OH)2 B. Ca(OH)2, KOH, LiOH, NaOH C. KOH, LiOH, NaOH, Al(OH)3 D. Al(OH)3, NaOH, Mg(OH)2, KOH Giai thich vi sao chọn

x - 7 $\sqrt{x}$ + 6 Nhanh nha em cần gấp

viết thân bài cho bài văn về trải nghiệm covid của em giúp mình với mình ngày mai mình phải nộp r

Breakfast is the(1)............................... important meal of the day. It provides the nutrients your body needs for good health, the calories it needs for(2) ............................... and helps to maintain your blood sugar level. Stufies have shown that people who don't have breakfast have a low blood sugar level and are often slow, tired, hungry and(3) ............................... to concentrate. Surprosongly, breakfast actually play a part in weight control. It's easier to(4) ............................... weight if you eat in the morning rather than later in the day. Dividing the day's calories(5) ............................... three meals helps take off weight mor efficiently than(6) ............................... breakfast and having two larger meals a day does. 1. a. healthy ; b. tasty ; c. main ; d. most 2. a. strenght ; b. power ; c. energy ; d. effort 3. a. able ; b. enable ; c. unable ; d. capable 4. a. lose ; b. put ; c. gain ; d. drop 5. a. in ; b. into ; c. up ; d. for 6. a. skipping ; b. making ; c. buying ; d. serving GIẢI VÀ DỊCH GIÚP MÌNH VỚI Ạ. HỨA VOTE 5 SAO. MÌNH ĐANG CẦN GẤP Ạ

ai hướng dẫn em cách tìm giao tử với ạ ? ví dụ cách tìm AABBDd hoặc dạng khác ạ

40. Where should we go to buy some clothes, fruits and food? – In _________. A. a hall B. a living room C. a department store D. a stilt house 41. Don’t run the _________ half empty. It wastes energy. A. dishwasher B. kitchen C. wardrobe D. sink 42. She ran excitedly down the _________ to greet her cousins. A. furniture B. hall C. messy D. armchair 43. Would you mind helping me hang this dress in the _________? A. sofa B. sink C. wardrobe D. vase 44. A _________ is a piece of electrical equipment to store food and keep food cold or fresh. A. fridge B. dishwasher C. microwave D. cooker 45. He asked the children to go to the _________ and wash their hands. A. upstairs B. attic C. bathroom D. apartment 46. Put these glasses and bowls on the _________ over there, please. A. wall B. cupboard C. fridge D. lamp 47. My bedroom is big but it doesn’t have much _________. There is just a bed, a table, a chair and a bookcase. A. things B. picture C. desk D. furniture 48. It’s becoming hotter so I’m going to install a(n) _________ in my bedroom. A. fridge B. air conditioner C. television D. lamp 49. It’s better for your neck when you sleep with a _________ that is not too high or too low. A. pillow B.bed C. ceiling fan D. stool 50. I often reheat my soup in the _________ before eating. A. cupboard B. microwave C. dishwasher D. sink

căn x+4 + căn x-1 - căn (1-x)*(x+4)=1