下列液化气的各种性质中，（）是与运输有关的特性。A、反应性B、毒性C、蒸发潜热D、低

It is said that another acre of the world’s forest will be destroyed forever. Why is this happening? There are two reasons — land and wood. In many countries the trees have been cut down because the land was needed for animals or crops. In other parts of the world the trees are cut down because their wood is wanted. This wood is used by local people for firewood or it is used for building. But many people don’t know that in most places the trees won’t be replaced. The soil in the forests is very thin, but it is protected by the trees. When the trees are cut down, the soil is washed away by the rain or blown away by the wind. Soon nothing can be grown on it. The  forest becomes a desert. Then more land will be needed, and more trees will be cut down.

When the forest is destroyed, it isn’t only the trees that are lost — the homes of millions of animals and plants are destroyed, too. All kinds of animals are in danger — fish，reptiles, birds, mammals, insects, and shellfish — as well as thousands of plants.

Who is to blame for this? The answer is simple: all of us. There are just too many people in the world. The world’s population is now six billion. Of course, it’s very easy to blame the local people. We don’t cut down trees. They do. But the products are bought by people like you and me — wood houses, beds, tables, chairs, paper… Why are the forests being destroyed? Just look around. You are probably using it right now.

小题1:People cut down large areas of trees in order to _________.

A．grow crops

B．keep animals

C．build houses

D．get land and wood小题2: In most places, __________after trees are cut down.

A．new trees can grow better

B．forests will become deserts

C．most animals can live there

D．people build new house there小题3: According to the passage, we should  _________________ to protect the forest.

A．use fewer wood products

B．plant more trees

C．blame the local people

D．protect the soil

修建性的详细规划主要内容有（）。

A.工程管理线规划设计

B.建设条件分析和综合技术经济论证

C.道路系统规划设计

D.绿地系统规划设计

E.制定相应的土地使用与建筑管理规定的细则

治疗脾虚气陷型的痔疮，可在基本处方上再加（）。

A.气海

B.血海

C.足三里

D.脾俞

E.阴陵泉

通过文字、数据分析、图表等形式将调查结果表现出来的是（）。

A.调研报告

B.消费者调研数据

C.内部部门总结

D.外部部门指导意见

在不同的运行着的应用程序之间切换，可以利用的快捷键是( )。

A．Alt+Esc

B．Ctrl+Esc

C．Alt+Tab

D．Ctrl+Tab