我校某生物兴趣小组的同学在探究“光照对黄粉虫生活的影响”时：

①该探究实验要做出的假设是光照对黄粉虫幼虫生活有（或没有）影响．

②该实验中的变量是____，在设计实验时，要给黄粉虫幼虫提供____和____两种环境，以便对照；

③假如光亮处没有黄粉虫或者是黄粉虫数量很少，则得出的结论是____．

④如果“探究湿度对黄粉虫幼虫生活的影响”，则实验中的变量是____，需要给黄粉虫幼虫提供____和____两种环境，其它条件则完全____．

⑤在进行数字统计后，要求取平均值，目的是____；选取黄粉虫时需要选几十条而不选用几条，原因是____．

游白水书付过①

苏轼

       绍圣元年十月十二日，与幼子过游白水“佛迹院”②。浴于汤池③，热甚，其源殆可熟物。循山而东，少北，有悬水④百仞。山八九折，折⑤处辄为潭，深者縋石⑥五丈不得其所止。雪溅雷怒，可喜可畏。山崖有巨人迹数十，所谓佛迹也。暮归倒行⑦，观山烧⑧，火甚。俯仰度⑨数谷。至江，山月出，击汰⑩中流，掬⑾弄珠璧。到家，二鼓⑿，复与过饮酒，食余甘煮菜。顾影颓然，不复甚寐。书以付过。东坡翁。

      【注释】①此文是作者远谪惠州上所作。白水：山名。过苏轼第三子，名过，题目的意思是作者与儿子苏过同游白水山后写成此文交给苏过。②佛迹院：寺庙名③汤池：温泉④悬水：瀑布⑤折：弯转⑥縋（zhuì）石：用绳子系着石头向下。⑦倒行：顺来路回去⑧山烧：一说夕照景象，一说山火；⑨度：越过⑩击汰：击水，汰：水波。⑾掬：用双手捧取。珠璧：喻星月在水中的倒影；⑿二鼓：二更。

如图，在半径为10cm的圆中作一个正六边形ABCDEF，试求此正六边形的面积．

    Mr Jones and Mr Brown work in the same office. One day Mr Jones says to Mr Brown, “We want to  have a small party at our house next Wednesday evening. Do you and your wife want to come ?”

    Mr Brown says, “Thank you very much. I must phone my wife and ask her.” So Mr Brown goes to the other room and makes a telephone call. When he comes back, he isn't happy.

    “Why are you not happy?” asks Mr Jones, “Do you speak to your wife?”

    “No, She isn't at home. My little son answers the phone. He says she is looking for him outside(在外面) .”