Environment means all the natural surroundings such as land, air, water, plants, animals, solid material, wastes, sunlight, forests and other things. Healthy environment maintains the nature’s balance as well as helps in growing, nourishing and developing all the living things on the earth. However, now a day, some manmade technological advancement spoiling the environment in many ways which ultimately disturbs the balance or equilibrium of nature) (Dịch nốt )

tam giác ABC vuông tại A, đường cao AH (AB<AC) a) chứng minh tam giác HAC=tam giác HCA b) biết HB = 4cm, HC =9cm. Tính AH

Giải hộ mjk ik ạ Vote 5 sao này

Cho tam giác ABC vuông tại A;đường cao AH;H thuộc BC: A.chứng minh tam giác HBA đồng dạng với tam giác ABC B.chứng minh AC^2=HC.BC C.Kẻ BD là đường phân giác của tam giác abc,D thuộc ac cắt AH taị I,cmr:AD.AI=IH.CD

Với x khác 0, tìm giá trị nhỏ nhất của biểu thức L=x²-2x+2021/x²

Cho mik hỏi hình này tô bút j ạ (loại màu j vậy?) MNG xem qua các cây bút r nói cho mik với HÌNH TIỆN vẽ cho mik hình galaxy với

Giải giúp mình với mình đang cần gấp

giup mk vs 61. The Brofvdcvvv wns (live)……. in Paris for 7 years when the second world war (break)………. out. 62. Last month I (be)…………………….in the hospital for ten days. 63. Don’t call me in the afternoon. I usually (be)………………...away in the afternoon. 64. John (drive)………..that car ever since I (know)……….him. 65. People (speak)……….English in most of Canada. 66. The dog (wag)………his tail whenever he (see)………me. 67. I (never see)…………anyone more punctual than your brother. 68. I (meet)……. your brother this afternoon at Green Street. 69. He (light)………. a cigarrette and (walk)………to the window. 70. The performance (begin)………….at 7 o’clock and (last)……………..for 3 hours. 71. “You (be)…….here before? ” - Yes, I (spend)……..my holidays here last year. 72. He (leave)…………for London 2 years ago and I (not see)……..him since. 73. You (be)…………………to the laboratory this week? 74. Thousands of people (see)……….. this exhibition by the end of the month. 75. By the time you (finish)…………. cooking they (do)……………… their homework. 76. I don’t think he (change)………in the thirty years I (know)……..him. 77. Then about a year ago he (disappear)………….and I (never hear)……… from him since. 78. My father (fight)…………. for 4 years in the last war. 79. I’m taking my daughter out tonight. She (not have)…………..fun for a long time. 80. When I (look)………… at my suitcase,I could see that somebody (try)……….to open it. 81. When we (get)…………. to the restaurant, we (find)……….that nobody (remember)…………………..to reserve a table. 82. The doctor (examine)……….him, and that he (break)………..his arm. 83. As soon as she arrived England, she (find)……..that the language (be)……quite different from the English that she (learn)………………..at school. 84. I’m going to bed. I (work)………………..for hours and I’m tired. 85. Good afternoon. Can I help you? – Yes. I (bring)……………...my watch to youfor repair 3 weeks ago. Is it ready yet? 86. I wanted to be the first to teel her the news, but I was too late. Someone (already tell)……………………her. 87. He (come) ………in to the room a moment after I (get)……. there. 88. I hardly (be)………there 5 minutes when Mrs . Brown (come)…………in with the coffee. 89. Scarcely they (move)…………….. into the new house when their friends (come)……..in. 90. I (meet)……………...John before I (be)…………….. a fortnight in Paris.

"Its targeted use is by researchers at academic and government labs as well as biotechnology and pharmaceutical companies for DNA sequence assembly." nghĩa là gì? (Ko dùng dịch)

3. his/was/that/painting/artist/for sale/explained/not