
第二章
Authored by angel雪花 angel雪花
Science
2nd Grade
Used 2+ times

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23 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
用一个带有小孔的板遮挡在屏幕与物之间,屏幕上就会形成吴的倒像,这种现象叫做小孔成像。下面关于小孔成像说法,正确的是?
只能成放大的像,不能缩小的像
所成像的大小跟小孔与屏的距离无关
像与物体相比上下颠倒,左右不对调
像与物体相比上下颠倒,左右也对调
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
雨后晴朗的夜晚,为了不踩到地上的水,下面判断种正确的是?
迎着月光走,地上亮处都是水;背着月光走,地上暗处是水
迎着月光走,地上暗处都是水;背着月光走,地上亮处是水
迎着月光走或者背着月光走,地上亮处都是水
迎着月光走或者背着月光走,地上暗处都是水
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有一个方框内放了一块镜子两条平行光射到镜子上经反射后射出,射入的光线与对应射出的光线如图中箭头所示,则这面镜子是?
平面镜
凸面镜
凹面镜
不能确定
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
在凸面镜,凹面镜,凸透镜,凹透镜中,对光有会聚作用的?
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
在奥运会上,有摄影师记者拍下一个跨栏运动员优美的跨栏姿态。运动员通过照相机镜头所成的像是?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下想想不能用光的直线传播来解释的是?
日食,月食现象
立竿见影
坐井观天,所见堪小
太阳光经过三菱镜后分成各种色光
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一人沿公路步行,经过一盏路灯的过程中,地面上人影长度的变化情况是
逐渐变长
先变短,后变长
逐渐变短
先变长,后变短
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