新型空调车车票，最远售至（）。A.旅客终到站 B.本次列车终到站 C.线路终点站 D

掘进机非操作侧，必须装有能紧急停车的紧急停止按钮。（）

如图所示，轻质弹簧劲度系数为k，下端挂着质量为m的小球，静止在固定的斜面上，斜面的上表面光滑，斜面倾角为θ，则弹簧伸长的长度为    （    ）

A．

B．

C．0

D．

We human beings haven’t been good friends to animals. For thousands of years, we have been polluting the environment, making it hard for animals to live on the planet. We have been killing animals for their fur, feathers or meat, or simply because they are dangerous. As a result, many kinds of animals have disappeared forever. Hundreds more are on the endangered list today.

Should we care about animals? Of course we should. If animals of a certain kind all disappear, they will never come back again. Animals are more than just resources of things we need. Every kind of animal has its place in the balance of nature. Destroying any kind of animal can lead to many problems. For example, when farmers killed large numbers of hawks, the corn and grain that the farmers stored were destroyed by rats and mice. Why?  Because hawks eat rats and mice. With less and less hawks to keep down their numbers, rats and mice multiplied quickly. And if people kill too many birds, more and more insects will eat the crops.

Luckily, we’ve realized that we shouldn’t kill animals any more. And people are working hard to save those animals that would disappear soon. The government also passed laws to protect the endangered animals. In fact, quite a few countries have passed such laws. These laws forbid the killing of any kind of animal on the endangered list. We should try our best to protect and save the endangered animals.

小题1:The text calls on us to__________.

A．keep animals at home

B．protect the environment

C．protect the endangered animals

D．know more about the balance of nature.小题2:Why do people kill animals?

A．Animals cause many serious problems.

B．They kill animals for something they need.

C．Animals destroy their natural resources.

D．They kill animals to protect the environment小题3:The example that farmers killed hawks shows that__________.

A．there were too many rats and mice

B．hawks are the most important in the nature

C．animals are good food resources

D．every kind of animal is important in nature

常见温度仪表按其测量范围怎样分类？

果冻的一般用料是（）等。

A、果汁、鱼胶片、牛奶、水、糖

B、鱼胶片、水、糖、香精、食用色素

C、果汁、鱼胶片、糖、水、香精、食用色素

D、果汁、鱼胶片、奶、鸡蛋、香精、食用色素