What can we do to keep the resources renewable? , minhf vote 5* cho

Có 4 dung dịch không màu đựng trong các lọ mất nhãn:Fe(NO3)2,AgNO3,NaCl,Na2CO3.Chỉ dùng thêm một thuốc thử để nhận biết các dung dịch trên.Viết PTHH

I . VOCABULARY: Circle the letter before the word that can be best replaced with the word(s) in italic. ( chọn từ đồng nghĩa với từ được in nghiêng) 1. Thanh Ba Post Office is equipped with advanced technology. A. modern B. outdated C. fashionable D. beautiful 2. Thanh Ba Post Office has a spacious and pleasant front office. A. cramped B. large and with a lot of space C. narrow D. safe 3. Your EMS mail will be delivered in the shortest possible time. A. European Monetary System B. Enhanced Messaging Service C. Express Mail Service D. Emergency Mail Service 4. Many organizations have been set up and funds have been raised. A. established B. collapsed C. delayed D. decreased 5. Laws have been to prohibit the killing of endangered animals. A. allow B. not ban C. ban D. encourage 6. Human beings are changing the environment in all respects through their actions and by their habits. A. species B. types C, number D. areas II. Choose the underlined part among A, B, C or D that needs correcting. (chọn đáp án có lỗi sai) 1. The man whom remained in the office was the manager. A B C D 2. Mr. Brown, that teaches me English, is coming today. A B C D 3. The car who I bought used to be my father's. A B C D 4. The knife with that we are cutting bread is very sharp. A B C D 5. The man whom son is my friend is a doctor. A B C D III. Choose the best answer. (chọn đáp án đúng nhất) The magazine _________ you lent me is interesting. A. what B. which C. whom D. whose My wife, _________ is a doctor, works at Community Hospital. A. who B. which C. whom D. that I know a boy ________ name is John. A. who B. that C. whom D. whose I sent my friend the books ________ I had written. A. who B. whom C. which D. what Tom made a number of suggestions, most of ____ were very helpful. A. them B. which C. that D. B & C Do you know the man about ___________ they're talking? A. whom B. whose C. that D. A & C

Cho tam giác ABC vuông tại A, có góc B=60°,BC=20cm a, tính AB,AC b,kẻ đường cao AH của tam giác, tính AH,HB,HC.

làm hộ mình câu 3 với mình đang cần gấp

D =1^2-2^2+3^2-4^2+.....+99^2-100^2+101^2 Giúp mik nhé Mik đg cần gấp

giúp mik bài này vs ạ a. 3x-2=2x-3 b. 2x+3=5x+9 c. 5-2x=7 d. 10x+3-5x=4x+12 e. 11x+42-2x=100-9x-22 f. 2x-(3-5x)=4(x+3) g x(x+2)=x(x+3) h 2(x-3)+5x(x-1)=5x^2

1. My brother is a hard worker. My brother ........................................................... 2.They plan to collect and empty garbage . They are going........................................................ 3. The teacher said to us " spend more time on English ." The teacher told us................................................................... 4. My father often lived in the country side when he was small. My father used..................................................................... 5. My friend is not interested in playing soccer. My friend doesn't ..............................................................................

Sử dụng in order to/ so as to để gộp 2 câu lại giúp em với anh chị ơi :(

x*100+x*200+x*300+x*400+x*500+x*512=2012 mk đg cần gấp nha trả lời nhanh mk cho câu trả lời hay nhất nha