凸透镜在生活、生产等各个领域有着广泛应用,下列说法符合实际的

凸透镜在生活、生产等各个领域有着广泛应用,下列说法符合实际的是

A.近视眼应佩戴凸透镜,是利用凸透镜对光线的会聚作用

B.用照相机给人拍照,要使像更大一些,应减小被拍照者到镜头的距离

C.借助放大镜看地图时,要增大放大的效果,应减小放大镜到地图的距离

D.显微镜的物镜可以将微小的生物放大,是利用了凸透镜能成放大的虚像原理

答案

B

相关题目

请以“宝贝”为题写一篇文章。要求:立意自定,文体自选
请以“宝贝”为题写一篇文章。要求:立意自定,文体自选,不少于800字。
已知集合,则等于( ) A.          B.      C.  
已知集合,则等于( ) A.          B.      C.       D.
X、Y为同主族元素,Y的原子半径大于X。下列说法正确的是(m
X、Y为同主族元素,Y的原子半径大于X。下列说法正确的是(m、n均为正整数)A.若X(OH)n为强碱,则Y(OH)n也一定为强碱B.若HnXOm为强酸,则X的氢化物
For centuries, everybody knows laughter is the best medicine. Besides bringing
For centuries, everybody knows laughter is the best medicine. Besides bringing joy, the doctor also 61  (believe) that laughter helps release stress, which is the cause of many diseases. The
下列运算中,结果是a5的是( ) A.a10÷a2       B.a2•a3
下列运算中,结果是a5的是( ) A.a10÷a2       B.a2•a3  C.(a2)3    D.(﹣a)5
Having received ________ training of the MS. Company, he was offered ________ im
Having received ________ training of the MS. Company, he was offered ________ important position in management. A. the; an B. /; an C. the; / D. a; a
(本小题14分) (1) 证明函数 f(x)= 在上是增函数; ⑵求在上的
(本小题14分) (1) 证明函数 f(x)= 在上是增函数; ⑵求在上的值域。
Everyone needs to have at least eight hours’ sleep a night, so you shouldn’t
Everyone needs to have at least eight hours’ sleep a night, so you shouldn’t ______ too late.A.give upB.stay upC.put upD.make up

最新题目