人站在平面镜前，当他向平面镜走近时，下列说法正确的是（ ）
A．像变大，像到镜面的距离变小
B．像变大，像到镜面的距离变大
C．像不变，像到镜面的距离变小
D．像不变，像到镜面的距离不变
根据平面镜成像特点可知物体和像大小相同，物体到平面镜的距离和像到平面镜的距离相等，
所以当他向平面镜走近时，所成的像大小不变，像到镜面的距离变小，
故选项ABD错误；选项C正确．
故选C．
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| 把以上五个人的问题与下面的建议A-E搭配。 | ||||||||||
| A. Nobody is born stupid. Maybe you haven't got right ways of study yet. Ask the teachers or classmates for help if you have questions. B. Your classmates may not laugh at you. If you don't like their laughter, you should talk to them about your feelings. They might understand you. You had better be more easygoing and be their friends, so you won't feel frustrated if your friends laugh. C. Don't be afraid. You should tell your parents or teachers at once. Don't go out alone. D. Let your parents know your friends are nice. You learn a lot from them when you have fun with them. You study with them outside, too. E. Tell your mother you need her company (陪伴) sometimes. Also you should do somehousework with your mother so that she can finish her work quickly. Try to understand your mother, too. |