Cho tam giác ABC cân tại a,Biết góc a bằng 30 °,Cạnh DC =2cm ,Trên AC lấy D sao cho góc CBD =60 độ .Tính AD

giúp mình hai câu này với mình cám ơn

mọi người cho mình hỏi bài này ạ 1 Rewrite the sentences so yhat it has smilar meaning as the sentense printed before using the words given 1 they will install solar panels on the roof of our house next week solar panels... 2 they will build a new school for poor children next mouth a new school ... 3 will the plumber check cracks on the water pipes in two days ? cracks ... 4 they sell these chemicals everywhere in my hometown these chemicaals ... 5 they won't show the film on types of picture energy sources next friday the film... 6 some people will interview the new president on tv the new president... 7 they will destroy the old thermal power plane at the end of this year the old thermal ... 8 they will widen the road to our village next year the road ... 9 we will be using biogas for cooking and heating at this time next mounth biogas ... 10 they got the first prize at the competition the first ...

dịch : I'm tired of everything around

viết các phân số sau theo thứ tự từ lớn đến bé:5/2,2/7,4/5,10/3,2/3,15/89

Cách nhanh nhất có thể để tính: $\frac{1}{\frac{1}{45} + \frac{1}{36}+\frac{1}{24}}= 10,9$

Anh ấy thường đi đâu vào các kì nghỉ hè? DỊCH SANG TA

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

nhiệt phân KClO3 thu được 33,6lO2 . Tính khối lượng KCLO3 biết hiệu suát là 90%

IV. Em hãy điền một danh t ừ chỉ nghề nghiệp thích hợp cho mỗi câu dưới đây. V í d ụ: 0. She teachers is in a school. She is a teacher. 1. He works in a hospital. He takes care of sick people. He is a …………………….. 2. She writers articles for newspapers. She is a …………………………… . 3. He works in a hospitals. He takes care of people’s teeth. He is a ……………………. . 4. He works on a farm. He grows vegetables and raises cattle. He is a ………………….. . 5. She works in a studio. She paint pictures. She is a ……………………… . V. Em hãy dung từ gợi ý để viết hoàn chỉnh những câu sau. Ví dụ: 0. The Nile / longest / river / world. The Nile is longest river in the world. 1. Trang / the / good / student / our class . 2. Refrigerator / next /closet / and / front / dishwasher. 3. Traveling / train / slower / but / intersesting /traveling / plane. 4. Miss / Hue / take care / sick children /same hospital / as / mother. 5. Which / most / suitable house / Mr. Lam /and / family ? 6. Uncle / farmer / and / grow / lot / vegetables / his farm. 7. It / difficult / find / a partment / Ho Chi Minh city ? 8. Brazil / most / successful / soccer team / world. 9. Who / the / fat / person / your / group? 10. Lesson / this year / long / and / more difficult / those / last year. VI.Em hãy dịch những câu sau sang tiếng anh. 1. Một bãi biển mới đẹp lam sao ! Chúng tôi sẽ đến đó vào dịp hè này. 2. Tokyo là một trong những thành phố đắt nhất thế giới. 3. Cuộc sống ở thành phố ồn ào hơn nhưng thú vị hơn cuộc sống ở nông thôn. 4. Chị gái mình là một nhà báo. Chị ấy viết bài cho báo thanh niên. 5. Máy bay là một phương tiên giao thông nhanh nhất.