下列关于生物学实验中常用技术及方法的相关描述，正确的是（ ）
A：对培养液中酵母菌数量进行计数时，采用抽样检测法
B：研究土壤中小动物类群的丰富度时，宜采用标志重捕法
C：观察洋葱根尖细胞有丝分裂实验中，漂洗的目的是洗去多余的染液
D：“脂肪的鉴定”实验中，用50%的盐酸是为了洗去浮色
下列生活中的做法，正确的是（ ）
20世纪50—70年代的日本和当前的中国在经济发展方面存在许多共同经历，下列说法不正确的是( )
On a cold winter day, a fox ____ mother bear that he would teach her how to fish. As she____ to learn, he took her to a hole in the ice, and told her to put her tail down in the water. He told her to keep the tail there for____ . Then____ she pulled the tail out of the water, she would find fish around the tail. The bear was foolish enough to believe____ the fox said. She sat for a long time with her tail in the water. She was ____ the fish. But when she____ to pull her tail lout of the water, she found that it was frozen in the ice. She asked the fox to pull her out. But he laughed to himself and ____ . so she called father bear to help her. Father bear came. He pulled hard and ____ got her out, but a part of her tail was in the ice. That is____ people find the bear’s tail so short.
英国作家萨克雷说：“生活是一面镜子，你对它笑，它就对你笑，你对它哭，它也对你哭。”萨克雷告诉我们要会（ ）
