Đáp án:
Giải thích các bước giải:
1. Cho tam giác abc nội tiếp đtron (o), 2 đg cao ad,bk cắt nhau tại h. Ad cắt (o) ở e a) CMR bc là tia phân giác của hbe b) CMR e đối xứng vs H qua BC 2. Cho (O,R) đkinh ab thì dây ad cắt nhau ở e nằm trong (o). CMR ae.ad+be.bc=4r^2
Viết hai đoạn văn trình bày cảm nhận của em về nhân vật Dế Mèn và Dế Choắt trong truyện"Bài học đường đời đầu tiên"
91. Your hairstyle is quite similar _____ me. A. from B. with C. of D. to 92. Nguyen Du devoted all his lifetime ______ writing. A. for B. to C. in D. from 93. I bought a coat ______ my mother _______ the supermarket. A. from / for B. for / at C. for / from D. for / in 94. She was very surprised ______ the grade she received. A. at B. on C. of D. about 95. We might need more food, depending ______ how many people turn up. A. for B. on C. at D. with 96. Jane doesn’t spend much money ______ clothes. A. over B. about C. at D. on 97. A sign warned motorists ______ dangers. A. of B. for C. about D. A and C 98. They translated the letter ______ French. A. for B. with C. into D. about 99. I was disappointed ______ the grade I received on my last essay. A. for B. about C. to D. A and B 100. Since she graduated, Anne has no longer been dependent _____ her parents for financial support. A. to B. on C. upon D. B and C 101. Catherine became accustomed _____ spicy foods when she was traveling. A. to B. on C. for D. about 102. Table salt is composed _____ two elements, sodium and chlorine. A. to B. around C. of D. for 103. Is there enough ______ that salad _____ everyone. A. of/ for B. with / for C. to / to D. on / with 104. His computer is not capable _____ running this software. A. to B. on C. for D. about 105. Washington state is famous ______ its apples. A. in B. for C. of D. with 106. Was your choice of research topic acceptable ______ your instructor? A. for B. to C. on D. upon 107. People who are afraid ______ heights are called acrophobias. A. of B. on C. in D. to 108. Water is essential ______ all life. A. on B. for C. in D. with 109. Were you aware ______ the regulations against smoking in this area? A. in B. with C. of D. about 110. Tepees are characteristic _____ the Indian tribes of the Great Plants. A. of B. upon C. from D. about 111. Will this office be adequate _____ your company’s need? A. on B. for C. to D. with 112. I’m not familiar ______ that song. A. to B. of C. with D. about 113. This movie is based ______ a true story. A. about B. on C. to D. with 114. This summer he will be eligible ______ a three week vacation. A. on B. about C. to D. for 115. What he said is contrary ______ common sense. A. for B. about C. of D. to 116. Many vegetables, including tomatoes, and corn, are native ______ the New World. A. for B. to C. about D.upon 117. This style of architecture is typical _______ the Colonial period. A. of B. to C. about D. with 118. Oxygen, fuel, and heat are all necessary ______ combustion. A. with B. for C. about D. in 119. This variety of seed inferior _____ the type I planted last year. A. with B. upon C. up D. To 120. Thank you very much ______ what you have done for me. A. of B. up C. for D. about 121. The opposite ______ “old fashion” is “modern”. A. at B. of C. to D. in 122. House cats are distantly related ________ lions and tigers. A. in B. to C. of D. about 123. Is this type of soil suitable ______ growing tomatoes? A. for B. about C. in D. at
x+1/94 + x+2/93 + x+3/92 = x+4/91 + x+5/90+ x+6/89 các bn làm bài này hộ mk nha.
Giúp mình câu này với mình đang cần gấp
rút gọn biểu thức : $\frac{7^{48}*5^{30}*2^{8} - 5^{30} * 7^{49}* 2^{10} }{5^{29}*2^{8}*7^{48}}$
Tìm x, y, z biết x/2 = y/3 .y/4 = z / 5 và x^2 - y^2 = -16 Chúc cc ăn tết zui zẻ nhaa
Cho tam giác ABC vuông tai A, đương cao AH. Gọi I, K theo thư tự là trung điểm của AB, AC. a, Cho AB=6 cm, AC = 8 cm. Tính BC, IK, AH? b, Chứng minh rằng: IK vuông góc AH c, Chứng minh rằng: góc IHK = 90 độ.
Bài 1 Tìm hai số nguyên a b Biết a>0 và a.(b-2)=3 Bài 2 Tìm số nguyên n để 2n + 1 chia hết chon-3
Đánh giá công lao của Lê Lợi & Nguyễn Trãi trong cuộc khởi nghĩa Lam Sơn. Đầy đủ ko thiếu 1 chi tiết
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