题目

笑话兴趣小组自制道具探究小孔成像：如甲图所示，她将易拉罐盖子去除，在底部中心钻个小孔，AB为两端开口的圆形纸筒，用半透明塑料薄膜将A端蒙住，然后将纸筒插入易拉罐观察。 （1） 为便于观察研究，应将（A/B）端插入易拉罐，利用它观察窗外景物时，人眼应对着（薄膜/小孔）进行观察，将纸筒向易拉罐内推的过程中，观察到的像将（变大/不变/变小）； （2） 小组同学采用LED灯研究像的性质，下列形状的LED光源最合适的是（____阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。Chinese brush calligraphy or “shufa” in Chinese is one of 【1】 most important art forms in China. Many Asian cultures have originated their own calligraphy styles, but China’s is unequaled because of 【2】 (it) beauty, grace (优雅), and history. The 【3】 (origin) of Chinese brush calligraphy are unknown, but local tales say it goes back over 4,000 years to the time of the legendary (传说的) Yellow Emperor (2698-2598 B.C.). At that time characters were carved on animal bones or tortoise shells. Only after Emperor Qin Shi Huang united China under his rule 【4】 one country did it really gain popularity as a common art form. He simplified Chinese characters and regular rules were set, 【5】 (make) it easier for people to learn and master. This Chinese art form continued to progress and during the Tang Dynasty (618-907 AD) a new type of cursive script (草书) was formed and standardized. It is written 【6】 (free), but it’s not as easy to read. Today Chinese calligraphy is once again a subject in schools and an art form highly 【7】(appreciate) across the world. Anyone can practice it and 【8】 is required is a simple set including: brush, ink, and paper. It’s fun for amateurs to try, but to become good at it, not only years of practice but natural talent 【9】 (need). Practising this art consistently can develop personal character and is of 【10】 (benefit) to health.