皮皮学，免费搜题
登录
搜题
【单选题】
夏天雨后，乌云飞散，太阳重新露头，在太阳对面的天空中，会出现半圆形的彩虹，这是因为（ ）。A.
雨后大量水滴悬浮在空气中，光线经过水滴时发生反射，红、橙、黄、绿等色光的反射角度不同，就形成彩虹
B.
雨后大量水滴悬浮在空气中，光线经过水滴时发生折射，红、橙、黄、绿等色光的折射角度不同，就形成彩虹
C.
雨后云层比较薄，容易发生折射，光线经过云层时发生折射，红、橙、黄、绿等色光的折射角度不同，就形成彩虹
D.
雨后云层比较薄，容易发生反射，光线经过云层时发生反射，红、橙、黄、绿等色光的反射角度不同，就形成彩虹
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】任务型阅读。 81-year-old man helped poor students On December 2, 2009, in No.1 High School, Yaling Town, Yichuan County, Luoyang, an old man with a stick is taking 300 notebooks and 120 ball pens out of a b...
【单选题】How old was the man on his first day at school?
A.
Six years old.
B.
Over six years old.
C.
Five years old.
D.
Ten years old.
【简答题】阅读理解。 An old man sees some money on the road outside the school gate. He picks it up and waits there all day, but no one comes to take it back. He says, 'I don't have any money, so I'm going to take t...
【单选题】__________ he is old, the old man still insists on studying at a night school.
A.
If
B.
Although
C.
When
D.
Because
相关题目：