một hình nón có bán kính đáy bằng 3 cm chiều cao bằng 5 cm. thể tích của hình nón là

a, Xác định chiều dòng điện trong hình vẽ chấm sau: b, Xác định các cực của nam Giúp vs ạ ...........

viết đoạn văn nêu giá trị của lúa gạo đối với con người

Giúp e gấp ạ Lim(1-2n)căn n+3/n^3+n+1 bằng ?

cho hỏi: diễn biến của cuộc khởi nghĩa hai bà Trưng là gì?

Mỗi câu 9 thôi mong mọi người giúp đỡ

72. In the tropical countries, there are only two………… a. times b. seasons c. climates 73. Mary always takes care ………. . her children a. for b. of c. with 74. Would you like something …………. . a. drank b. drink c. to drink 75 My father is…………. than yours a. tall b. taller c. the tallest 76. Hoa is the …………. student in my class a. well b. better c. best 77. This lesson is …………. . than the last one a. easyer b. easier c. easy 78. English is……………. than music. a. more difficult b. difficulter c. difficultest 79. My sister learns English………. . a. well b. good c. goodly 80. Which of these is not a bird ? a. pigeon b. duck c. sheep 81. Where……. your parents last vacation ? a. is b. was c. were 82. The sun always . . . . . in the East. a. rise b. rises c. rised 83. They . . . . . the flowers in the garden now. a. are cutting b. are cutting c. cut 84. Where……… they . . . . . next summer holiday? a. will. . go b. does . . goes c. go 85. Hoa may. . . . . . at home. a. stays b. stay c. stayed 86. It . . . at present. a. rained b. rains c. is raining 87. Trinh. . . . . to visit her old teacher yesterday evening. a. was going b. goes c. went 88. Trung. . . . . when he was five years old. a. swim b. could swim c. is swimming 89. Seven minus five. . . . . two. a. are b. was c. is 90. There . . . . . a car here, but now it’s gone. a. was b. were c. is 91. They stayed at. . . . . hotel in the city. a. the cheapest b. cheaper c. cheapest 92. Australia is large but China is (large). . . . . . a. the larger b. larger c. more largest 93. I’ll see her. . . . . . Monday. a. at b. in c. on 94. What are you doing . . . . . the weekend? a. during b. at c. of 95. We often have a short holiday. . . . . . Christmas. a. of b. at c. in 96. Sang got married. . . . . . . 1999. a. on b. in c. of 97. He was absent yesterday. . . . . . . his illness. a. because b. because of c. since 98. He couldn’t walk steadily. . . . . she had an accident. a. because b. because of c. of because 99. Our holiday was too short. The time passed very. . . . . . a. quick b. quicker c. quickly 100. Trung and Trang are very. . . . . married. a. happy b. happily c. happiness

làm hộ mk câu 2 và câu 3 vs ạ vote 5 sao ạ

Tìm lỗi sai và chữa lại và giải thích vì sao : 78. Since the volcano last erupted, many houses have built on its slopes. A B C D 79. Since their usefulness, pesticides could pose potential risks to food safety. A B C D 80. If people didn’t use cars, there will be much less pollution. A B C D

Giúp em với ạk!! ~~~~~~~~~~~~~~~~~~~~~~~~~~~