幼苗得出土率是否与种子种植的深度有关？为研究这一问题，小科展开了相关的研究：将相似的120粒绿豆种子平均分成4组，在相同砂土中按不同的深度种植，放置在相同且适宜萌发和生长的条件下．连续观察15天，发现只有三组有幼苗先后出土，如图所示．在第15天对所有幼苗进一步观察，结果如下表所示．

光照条件下，一只大烧杯中装入大半杯清水，在烧杯底部放一些新鲜水草，通入一定量的A气体。静置一段时间后，用漏斗罩住水草将一只盛满水的小试管倒置于漏斗上。过较长时间后，试管里收集到少许B气体。对此实验，下列判断正确的是（     ）

   This is a picture of Mr Black's family. The man is Mr Black. The woman is Mrs Black. They have a son and a daughter. The son is behind Mr Black. He looks like his mother. His name is Mike. He's thirteen. Their daughter, Ann is behind Mrs Black. She is eleven. Mike and Ann are in the same school. But they are not in the same grade. Mike is in Grade Nine. Ann is in Grade Seven. They are good students at school. Mike likes English, but he doesn't like math. Ann likes Chinese and math. She also likes singing English songs.
根据短文内容完成下列句子，每空一词。