A:有丝分裂观察:解离根尖→染色→漂洗→制片→观察
B:脂肪鉴定:切取花生子叶薄片→染色→去浮色→制片→观察
C:蛋白质鉴定:将双缩脲试剂A液和B液混合→滴加到豆浆样液中→观察
D:植物细胞吸水和失水实验:撕取洋葱鳞片叶内表皮→制片→观察→滴加蔗糖溶液→观察
It's sunny today. The sun is shining(照耀)in the sky and it's very hot. Nancy goes to the train station(车站)to meet her mother at noon. She walks in the street. There are no trees and she's fat. So she feels very hot. But she doesn't find (发现)a boy walking behind her. And she meets a friend and says "Hello" to him. "Who's the boy behind you?" asks(问) the man. Now she sees the boy. She is angry and asks, "Why(为什么) do you walk behind me, boy?" there's no shade(阴凉处) in the street, you know" answers the boy. "It's cool behind you, I think(想)."
下面说话最得体的一项是( )。
阅读下面这首宋诗,完成下列小题。
送别
苏轼
鸭头春水浓如染,水面桃花弄春脸。
衰翁送客水边行,沙衬马蹄乌帽点。
昂头问客几时归?客道秋风黄叶飞。
系马绿杨开口笑,傍山依约见斜晖。
读我国土地资源分布示意图,根据图中信息,我国耕地主要分布在( )