题目

毕业照给同学们留下了美好的青春记忆。拍照时（ ）A．照相机镜头相当于凹透镜B．同学们应站在镜头一倍焦距以内C．照相机成缩小的实像D．想让成的像变大，镜头应远离同学们 答案：【答案】C【解析】A．照相机的镜头相当于一个凸透镜，故A不符合题意；BC．照相机照相时，同学们应站在透镜的两倍焦距以外，成倒立缩小的实像，故B不符合题意，C符合题意；D．凸透镜成实像时，物体越靠近透镜，像越远离透镜，成的像会变大，所以想让成的像变大，镜头应靠近同学们，故D不符合.【1】Picture One is a(n) ________.A. postcard B. posterC. invitation D. menu【2】You should reply to the Johnson family by ______.A. writing an emailB. making a phone callC. visiting them in personD. chatting online with them【3】If you want to eat well, you can’t miss the ________.A. Dance as a Job LectureB. Musical Theatre ClassesC. Weight Training ClassesD. Sports Nutrition Classes【4】How long will the camp last?A. Six days. B. Ten days.C. A week. D. A month【5】If you are a 15-year-old student, what time is your audition?A. 4:00 pm on Nov 13.B. 4:30 pm on Nov 14.C. 4:30 pm on Nov 18.D. 4:00 pm on Nov 19.