根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    One day, when Bill was walking home from school, he heard a 1 coming from the bushes(灌木). He went over  2 what it was. Behind a bush, he found a black dog. Bill went back home as soon as he could with the dog and 3 her to his parents. Bill's dad found that the dog had 4 leg, so they brought the dog to a doctor for animals 5 car. On the way Bill's parents decided that Bill could 6 the dog if they couldn't find the owner of the dog.

     When they arrived, the doctor checked the dog. He told Bill that she was going to have 7! The next day, Bill 8 signs like "FOUND DOG BACK" around his neighborhood. He also wrote his family's phone number on the signs.

     Two days later, Bill got a/an 9 from the owner of the dog. The owner thanked Bill. When he came to pick up his dog, he said Bill could have one of the babies. Bill was very 10! Finally Bill got a baby dog from the owner. He named him Rosco and liked him very much.

目前，世界人口增长模式是   （ ） 

3600÷400＝____

9600÷240＝____

1800÷300＝____

在生物学实验中，正确选择材料和试剂是实验成功的前提。请判断下列选择符合生物学实验要求的是

材料一：古先民平（公平）其政者，莫遂（达到）于秦。秦皇负扆（帝位）以断天下，而子弟为庶人。所任将相，李斯、蒙恬，皆功臣良吏也。……末俗以秦皇方（比）汉孝武（汉武帝）……孝武一怒，则大臣莫保其性……自法家论之，秦皇为有守。非独刑罚依科也，用人亦然……夫有功者必赏，则爵禄厚而愈劝……世以秦皇为严，而不妄诛一吏也。由是言之，秦皇之与孝武，则犹高山之与大湫也。……秦制本商鞅，其君亦世守法……非草茅、搢（缙）绅所能拟已。

——摘自《章太炎全集・太炎文录初编》

材料二：谈到中国的代表性文化遗产，不能不提及44年前的考古发现，考古工作者小心翼翼地用铲子、刷子和棉签打开已尘封两千多年的黄土，一个排列严整、气势恢宏的神秘地下军阵重现世界。

谜一样的秦陵，谜一样的始皇帝。有学者认为兵马俑生动传神，兵器与雕塑技艺高超；有学者则从历史认识入手，认为秦兵马俑是秦帝国复杂而高效的管理系统的象征，并分析秦朝立下的行政系统，从上到下要经过两层或三层的金字塔结构。

——据许倬云《中西文明的对照》等整理