Dùng máy ảnh mà vật kính có tiêu cự 5 cm để chụp ảnh một người đứng cách máy 3m a)Hãy vẽ ảnh của người đó trên màn hứng ảnh b)Xác định khoảng cách từ màn hứng ảnh đến vật kính lúc chạm ảnh ____Vote 5* và ctlhn!!!!!

Các câu hỏi liên quan

làm nhanh nhé 190. We live in Hue but my uncle__________. A. doesn’t B. don’t C. not D. isn’t 191. __________you speak French? - No, I can’t. A. Would B. Can C. Do D. Are 192. __________do you do when it’s hot? - I go swimming. A. Who B. What C. When D. Where 193. How __________bananas are there in the fridge? A. many B. much C. long D.often 194. The Red river is the__________in Viet Nam. A. long B. longer C. longest D. shortest 195. He wants__________an engineer. A. be B. being C. to be D. is 196. His children often play chess in __________free time. A. your B. her C. their D. his 197. Lan likes__________She swims and does aerobics. A. sports B. music C. games D. game 198. His father is a __________. He works in a factory. A. worker B. nurse C. teacher D. doctor 199. I’d like some rice. I’m __________. A. hungry B. hot C. thirsty D. thin 200. What about__________table tennis? A. play B. playing C. plays D. to play 201.How __________is it from here to your school? A. often B. much C. far D. long 202. It’s twelve o’clock, Nam. Let’s __________home. A. go B. to go C. going D. goes 203. Tuan and I __________ badminton in the yard. A. playing B. is playing C. are playing D. am playing 204. This sign says “Stop!”. We __________ go straight ahead. A. can B. don’t can C. must D. must not 205. They are going to New York __________plane. A. in B. by C. with D. on 206. Viet is __________ something on his book. A. writing B. writting C. wrote D. writes 207. Are there __________stores on your street? A. a B. an C. any D. the 208. My sister and I __________television in the living - room now. A. am watching B. are watching C. is watching D. watching 209. __________do you go to school? - I walk. A. How B. By what C. How many D. How by