题目

Just like the young character in Hannah Montana, who so often fights with her father over her desire to be more independent, British teenagers also have their troubles. A recent survey among 2,000 British parents shows that girls and boys experience similar kinds of stress, with some slight differences . Girls want to grow up fast, demanding greater freedom. They feel pressure from their peers to be thin and sometimes dangerously experiment with alcohol . Girls over 14 are more concerned with getting a boyfriend, make-up and going out with friends than with their schoolwork. They are more like关于《酵母菌的呼吸方式实验》（1）甲试管中酵母菌的呼吸方式是 ．（2）实验时，将甲乙两试管置于同一水浴环境的目的是 ．A、D两支试管的作用是 ．（3）BTB溶液的作用是 ．B、C号试管变色程度相同所用时间较短的是 号试管．（4）此实验选择酵母菌的原因是 ．