“一纸书来只为墙,让他三尺又何妨。长城万里今犹在,不见当年秦始皇。”六尺巷的故事被编译成歌曲搬上了2016年央视春节联欢晚会,备受好评。“让他三尺又何妨”主要体现了( )
A:孔子的“仁爱”思想
B:老子的“无为”思想
C:韩非子的“法治”思想
D:孟子的“民贵君轻”思想
小周用图所示的装置“探究凸透镜成像规律”.
(1)调节烛焰、凸透镜和光屏的高度,使它们的中心大致在同一高度,其目的是使像能成在 ____
(2)小周在图所示位置得到一个清晰的像.老师要求她在凸透镜不动的情况下.
在光屏上再成一个更小的实像,小周应当把蜡烛向 ____移动.同时把光屏向 ____移动.
(3)小周把自己的近视眼镜放在凸透镜与蜡烛之间,发现光屏上的像变得模糊不清.她应当向 ____移动光屏,可再次得到清晰的像.
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阅读下面短文,从A、B、C、D四个选项中选出最佳选项。
This is a picture of Mr. Li's family. The man in the middle is Mr. Li. The woman is Mrs. Li's wife. They have two sons. The child behind Mr. Li is Li Lei. He's thirteen. The boy in front of Mrs. Li is Li Ming. He is seven. Li Lei and Li Ming are in the same school, but not in the same grade. Li Lei is in Grade Two. Li Ming is in Grade One. They are good students.