根据短文理解, 从A、B、C、D四个选项中选择最佳答案填空。

    There are robots all around us. Some do very 1   jobs like flying planes and driving subway trains. And some do simple jobs.

    When an automatic自动的) washing machine   2 , water goes in. The machine wait until the water is hot  3   washing the clothes. It does this by "feedback(反馈)". Information about what's happening is fed back into the robot to tell it   4  to do next.

    Our eyes, ears and other senses are our feedback. They tell us   5  around us. So robots are like people in   6 ways. They work and they have feedback.

    But   7   robots look like people. Many are hidden away. Robots control the temperature o f our houses, our cookers, our hot water systems.  We can set the controls to the temperature we want. The robot does 8  . Its feedback usually comes from a thermostat（自动调湿器）.

    One kind of thermostat is a strip(细长片) of metal, which bends(弯曲) when it gets hot. At the right temperature, it bends just enough to work a switch. This turns   9 the heat. As the air around it gets 10   , the metal gets straight, and this turns the heat on again.

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

Jane Goodall has studied chimps for many years and helped people understand how much they behave like humans. She once spent years ____(observe) and recording chimps’ daily activities in their own environment. ____ she first arrived in Gombe in 1960, it was ____(usual) for a woman to live in the forest. Only after her mother came to help her for the first few months ____(be) she allowed to begin her project. One  ____ (importance) thing she discovered was that chimps hunt and eat meat. She also discovered how chimps communicate ____each other.

For forty years Jane Goodall has been outspoken about ____ (make) the rest of the world understand and respect the life of these ____(animal). She is leading____busy life and has achieved what she wanted to do. She inspires those women who want to make ____(achieve) in their lives.

下列对宽容理解正确的是(    )

下列说法正确的一组是（　　）

①不溶于水的盐（CaCO₃、BaSO₄等）部是弱电解质

②CO₂和HCl都是化合物又是电解质

③0.5mol/L所有一元酸中氢离子浓度部是0.5mol/L

④强酸溶液中氢离子浓度一定大于弱酸溶液中氢离子浓度

⑤电解质溶液导电的原因是溶液中有自由移动的阴阳离子

⑥熔融的电解质都能导电．

下列关于热现象的说法中正确的是（　　）