Cho 4,48 lít khí CO đi qua ống sứ chứa m gam CuO đốt nóng sau phản ứng thấy còn lại 18,4 gam chất rắn hỗn hợp khí ra khỏi ống sứ có tỉ khối so với H2 là 18 Giá trị của m

Qua đoạn văn trên em hãy tưởng tượng ra cuộc trò chuyện của những bông hoa gạo khi mùa xuân đến. Hãy viết một đoạn văn khoảng 7-10 dòng ghi lại cuộc trò chuyện đó

Nêu cách lập luận của văn bản "Bàn về đọc sách" của Chu Quang Tiềm

Nêu tính chất hoá học, vật lí của các hiđro halogenua và axit halogen hidric, sắp xếp theo chiều giảm dần tính axit, viết PTHH mình hoạ, tính chất riêng của axit flo hidric

viết đoạn văn từ 6-8 câu, cảm nhận của em về 2 câu thơ sau: chiếc thuyền im bến mỏi trở về nằm/ nghe chất muối thấm dần trong thớ vỏ

Giúp em với ạ Exercise: join the sentences, using who, that, which 1. We visited the church last sunday, it was beautiful 2. Thai nguyen is my hometown. I love so much

Hoàn thành các PTHH theo các sơ đồ phản ứng sau: A) CaCO3 + HCl --- > B) NaOH + NaHCO3---> C) Ba(OH)2+Na2CO3---> D)Ca(OH)2+Ca(HCO3)2---> E)CaCO3_t°> F)NaHCO3_t°> G)NaHCO3+HCl---> H)K2CO3+Zn(NO3)2--->

101. She is a. . . . . . . . girl a. beautiful b. beautifully c. beautifully 102. . . . . . his father ,Jack has a very good voice. a. Like b. As c. Same 103. You can go out . . . . . . you are. a. as b. like c. same 104. I wish I had a computer . . . . . . your. a. as b. like c. same 105. Mai is looking at. . . . . . . in the mirror. a. herself b. her c. hers 106. I am . . . . . . . to buy this car. a. enough rich not b. not rich enough c. not enough rich 107. Students. . . . . . . their homework before going to school. a. have to doing b. have to do c. have do 108. Where is this film. . . . . . . ? – At the Sao Mai movie theatre. a. to b. in c. at 109. The boys like. . . . . . . soccer after school. a. playing b. play c. played 110. Can I participate. . . . . . . this activity ? a. to b. at c. in 111. . . . . . . sing for peace ! a. Let’s b. Let c. Let’s us 112. I was born. . . . . . . May 25th,1979 a. in b. on c. at 113. I . . . . . . . . him since yesterday. a. has seen b. haven't seen c. hasn't seen 114. They . . . . . . . . stamps for 2 years. a. have collected b. has collected c. collected 115. How long you . . . . . . English ? a. has you studied b. have studied c. have you studied 116. Peter . . . . . . with his aunt for several years. a. haven’t stayed b. has stay c. has stayed 116. The child . . . . . . ill since last night. a. have been b. has be c. has been 118. We . . . . . . in HCM city since 1990 a. have lived b. have live c. has lived 119. The red book is . . . . . as the yellow book. a. as big as b. bigger c. so big as 120. Lan's schoolbag is . . . . . Hoa's schoolbag. a. different with b. different from c. difference from 121. Your hat is . . . . . my hat. a. same as b. the same c. the same as 122. The pen is . . . . . . as the eraser. a. not as cheap as b. not cheap as c. as cheap as 123. My father . . . . . coffee every morning. a. drinks b. drink c. drank 124. We . . . . . . English since 2002. a. learnt b. have learnt c. has learnt 125. She . . . . . to bed early last night. a. go b. don’t c. didn't go 126. What you . . . . . next Sunday ? a. will you do b. will do c. do 127. They . . . . . to music now. a. is listening b. are listening c. listening 128. I . . . . . 14 years old. a. is b. am c. was 129. Mai often . . . . . . to school in the afternoon. a. went b. go c. goes 130. She . . . . . swimming with her friends yesterday. a. go b. goes c. went 131. They . . . . . . English tomorrow. a. will has b. have c. will have 132. I . . . . . there for a long time a. has been b. have being c. have been 133. He . . . . . for London a year ago. a. left b. has left c. leaves 134. She. . . . . . in Hue for 20 years. a. lived b. lives c. has lived 135. Everyday thousands of people . . . . . by motorbike in Vietnam. a). traveled b. travel c. have traveled 136. He. . . . . . you next Monday. a. sees b. has seen c. will see 137. The houses. . . . . taller and larger. a. to get b. get c. are getting 138. She enjoys . . . . . fish. a. eat b. eats c. eating 139. They have lived here . . . . . . 5 months. a. since b. for c. in 140. Your hat is the same . . . . . . my hat. a. from b. with c. as 141. He was born . . . . . . April 25, 1993. a. on b. at c. in 142. Do you mind . . . . . this sentence to me ? a. explaining b. explain c. explained 143. Would you mind if I . . . . . on the cassette? a. turning b. turned c. turn 144. The glasses . . . . . last night are mine. a. break b. breaking c. broken 145. The man . . . . . over the e is my boss. a. standing b. stood c. stand 146. Do you mind if I . . . . . . TV? a. watched b. watching c. watch 147. We'll use the computer . . . . . save time. a. so as to b. in as to c. in as to 148. It is difficult . . . . . the door. a. open b. opened c. to open 149. The girl . . . . . at 24 Le Loi Street is my close friend. a. living b. lived c. live 150. The film . . . . . on TV won the 1st prize in the film festival last year. a. showing b. show c. shown

Làm trắc nghiệm hộ mình (giải tại sao chọn đáp án đó)

Cho tam giác ABC vuông ở A, có cạnh BC cố định. Gọi I là giao điểm của ba đường phân giác trong. CM điểm I nằm trên 1 cung tròn chứa góc 155 độ dựng trên đoạn thẳng BC