Nêu những cảm nhận ( suy nghĩ ) về đoạn trích trong truyện " Người đi săn và con vượn "

cho 12g kim loại R thuộc nhóm IIA tác dụng hết với dung dịch HCL thì thu được 11.2 lít khí H2 (đktc). Kim loại R là: A. Mg B. Be C. Ca D. Ba

Trong mặt phẳng oxy cho 2 điểm A (2; -1) và B (3;1) a, tìm ảnh a,b qua phép đối xứng trục ox,oy b, viết phương trình của đường thẳng đi qua phép đối xứng tâm o

giúp mik vs, nhanhhhhhhhhhhhhhhhhhhhhhhhhhh

phân tích thành nhân tử (2a+b)^2-(2b+a)^2

giải phương trình $\sqrt[]{x}$ + $\sqrt[]{4-x}$ = $\sqrt[]{5+ 4x- x^{2}}$

II-Choose the best answer for each of 1-The government has sent...aid to the refugees. A-human D-humanity C-humanitarian B-humane 2-“Are you singer or married?" is to ask about one's...... A-occupation 3-When he graduated from university he got his A-diploma 4-“....do you borrow this science book?" -"To read more about Marie Curie's life". A-what D-nationality C-address B-marital status ....... D-bachelor B-certificate C-degree D-which C-when B-why 5-She likes her children....to the dentist every six months. A-go 6-We were not hungry. We ....a big breakfast. A-just had 7-Please don't....to stamp on the letter I gave you to post. A-remind C-going D-to going B-to go B-have just had C-were just having D-had just had B-realize C-forget D-remember 8-He will ring up when he.......in Paris. A-arrives 9-Your windows need....at least once a year. A-cleaning 10-I.. .much better after I.... A-felt/had taken 11-It was raining hard, so we decided A-not going 12-My little daughter....whenever she ...sad movies. A-is crying/sees 13-I finally finished .......at seven and served dinner. A-cooking 14-By the time he reached the dentist's ,the pain in his tooth........ A-stops 15-It....him 30 minutes ......to school every morning. B-will arrive C-arrived D-would arrive C-being cleaned .the medicine. B-to clean D-have cleaned B-felt/took C-had felt/took D-had felt/had taken ..... B-not to go C-to not go D-not go B-cried/sees C-cries/sees D-cries/saw B-to cook C-being cooked D-to be cooked B-was stopping C-had stopped D-has stopped B-took /walked 16-She received... .the airport.......exactly 5 o'clock. A-take/to walk C-takes/walk D-takes/to walk A-in/at B-at/at C-at/in D-in/in

Hãy giái thích cho mình hiểu tại sao lại ra là( t²-4t+3) .cảm ơn nhiều ạ

2 1 after / Peter / match / tired /Was / the A Was Peter tired after the match? B Yes, he was. 2 you/ night/Where / last/ were A where B I was at home. 3 they / concert/ late/ the /Were / for B No, they weren't. 4 did / land / the / Where / plane A B At the airport. 5 did / college / your / in / brother / What / study B Biology. 6 Was / tall / boyfriend / very / your / first A B No, not really. 7 didn't / the / you / wait / Why / for / bus A B Because it was too cold. 8 time / work / did /What / arrive / Sandra / yesterday /a

Nhờ mn giải giúp mik với ạ, trình bày cách giải mik với luôn. Cảm ơn nhiều