实验小组发现，隔段时间做实验用的澄清石灰水表面产生了一层“白膜”．

“今天的汽车产业，无论从哪个意义上讲，都正面临着重大的转折。包括应对新兴市场的扩大、应对美国企业平均燃效法案、欧洲二氧化碳限排案等层出不穷且越发严厉的环境法规，进而解决全球范围的环境、能源问题等等。为适应这种变化，我们现在必须对哪些是需要改变的、哪些是需要坚持的逐一做出准确判断。”汽车巨头丰田公司的掌门人渡边捷昭如此评价目前的汽车业环境。

运用企业的经营与发展的知识回答，如果你是汽车巨头该如何“自救”？

根据短文内容，选择正确答案，在答题卷上将对应的字母编号涂黑。

                                                                                            (B)

    A man is walking through(穿过) a forest. He has some caps(帽子) in his hands. In the forest, there are a lot of monkeys. The day is hot, so the man has a rest under a tree. He puts one cap on his head and lies down to sleep(躺下睡觉). When he wakes up(醒来), he can't find his caps. "Where are my caps?" he cries and looks up. He sees some monkeys in the trees. Each(每个)has a cap on its head. "Give me back my caps!" shouts the man to the monkeys. But they don't understand(理解) him. They only jump, laugh(笑) and dance. "How can I get back my caps'?" he thinks. Then he has an idea. He takes off his cap and throws it on the ground. The little animals do the same thin9.

Happily the man picks up all the caps and goes on his way.

工厂中，贾师傅每天生产10个零件，李师傅每天生产20零件，现需要300个零件,若贾师傅和李师傅合作生产，x天可完成任务，列出等量关系式为____

蝙蝠能够飞行，但不属于鸟类，而属于哺乳类．主要理由是蝙蝠（　　）