Cho tam giác ABC trực tâm H, các đường cao AD, BE, CF (các điểm đều thuộc cạnh). Chứng minh: `(HD)/(HA)+(HE)/(BE)+(HF)/(CF)=1`

có cấu hình electron 1s22s22p63s23p63d64s2 cấu hình này là cấu hình nguyên tử hay ion tại sao???( Help me:((()

Nhờ mn giải dùm e vs ạ, e cám ơn nhiều <3

Bài 1. Chọn đáp án đúng 1. I ——————— at a bank. A. work B. works C. working 2. She ——————– with her parents. A. live B. lives C. living 3. Cows ———————– on grass. A. feed B. feeds C. feeding 4. He ———————- a handsome salary. A. earn B. earns C. earning 5. Janet ———————- to be a singer. A. want B. wants C. wanting 6. Emily ———————– delicious cookies. A. make B. makes C. making 7. Arti and her husband ——————- in Singapore. A. live B. lives C. living 8. Rohan and Sania ———————- to play card games. A. like B. likes C. liking 9. Sophia ————————– English very well. A. speak B. speaks C. speaking 10. Martin ———————– for a walk in the morning. A. go B. goes C. going 11. My grandfather ——————– his pet dog. A. adore B. adores C. adoring 12. Plants ———————– water and sunlight for making their food. A. need B. needs C. needing

Liên hệ đại dịch Covid-19 với cặp phạm trù nguyên nhân - kết quả ( triết )

1,Shall I bring you a cup of tea ? Would 2,You should do morning exercises to keep fit You'd 3,The children liked to walk in the rain The children enjoyed 4,No one in the class is as tall as Jack Jack is Bai 2: 1,food/like?/lunch/What/would/for/kind/you/of 2,durians/and/my/like/much/dose/I/very/father./sos 3,wash/more/must/the spinach/carefully./You 4,gave/some/him/better./Ba/to make./feel/Dr.Lien/medicine 5,you/feel/hungry./you/gives/and/Sugar/less/energy Bai 3: 1,you/be/absent/school/last semester 2,You/should/clean/vegetables/the water/carefully 3,Mai/like/orage/Nga/too 4,I/would like/take/part/sports/after/school 5,Eat/fruit/good/your health lam nhanh

giải giúp mình vs ạ mình cần gấp để nộp bài huhu

Giúp tui bài 7 với :(( lâu rồi ko làm nên ko biết

Writing the paragraph (about 200 words) in the interpretation of my thoughts about the situation of life of children in our country today. Help me có sẵn thì lấy luôn gấp lắm rồi

Giải giúp mình câu tìm X này với mình cảm ơn.