某同学在穿衣镜前，他看到了自己的全身像，如果他逐渐远离穿衣镜_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

某同学在穿衣镜前，他看到了自己的全身像，如果他逐渐远离穿衣镜，他在镜中的像的大小将是（　　）

A．变大

B．变小

C．不变

D．先变大后变小

答案

平面镜所成的像与物体是等大的，当人远离平面镜时，视觉上感觉像在变小，但实际上像的大小并没有变．所以他在平面镜中像的大小不变．

故选C．

填空题

选词填空。

expensive, down, famous, visit, leave, shopping, thought

    New York is one of the most exciting cities in the world. You might want to do some  1 in New York.
Fifth Avenue is probably New York's most  2 shopping street, but if you go, be prepared to "window shop"
only. This is shopping for the rich. There are other, less 3   shopping areas nearby, and you'll soon come
across famous stores such as Bloomingdales, Macy's and FAO Schwartz. And if you bring your Rollerblades
(轮滑鞋), you must  4 Central Park. This is a large, open park right in the middle of Manhattan, but if you  5
that people came here to relax, sit  6 for a few minutes and get away from the rush of New York life, then
you'd be wrong. Nobody sits in Central Park. They run, jog, and most of them go rollerblading. When you
  7 New York, you might be tired, even poor and overweight, but you won't be bored!

填空题

锅炉热平衡的组成式为（）。