用热性药治疗具有假热症状的病证，属于（） A．热因热用 B．寒因寒用 C．塞因塞用

以下动物的体腔中没有膈的是

A．蛇

B．家兔

C．猩猩

D．牛

已知a、b、c分别为△ABC的三条边长，试说明：b²+c²-a²+2bc＞0．

阅读理解

      Water is very important to living things. Without water there can be no life on the earth. All animals

and plants need water. Man also needs water. We need water to drink, to cook our food and to clean

ourselves. Water is needed in offices, factories and schools. Water is needed everywhere.

      There is water in seas, rivers and lakes. Water is found almost everywhere. Even in the desert part

of the world, there is some water in the air. You can not see or feel it when it is a part of the air. The

water in the seas, rivers and lakes is a liquid, the water in the air is a gas, and we call it water vapor (蒸气).

      Clouds are made of water. They may be made of very small drops of water. They may also be made

of snow crystals(结晶体). Snow crystals are very small crystals of ice. Ice is frozen water. It is a solid.

There can be snow and ice everywhere in winter.

     Water may be a solid or a liquid or a gas. When it is a solid, it may be as hard as a stone. When it is

a liquid, you can drink it. When it is a gas, you can not see or feel it.

1. Where can we find water?

A. We can find water when it turns into vapor.

B. Water can be found almost everywhere.

C. We can see water in deserts here and there.

D. Water is only in seas and rivers.

2. We can drink water when it is____.

A. a liquid  

B. a solid  

C. in the air  

D. turned into ice

3. Clouds are made of

A. seas, rivers and lakes      

B. blocks of ice

C. very small drops of water or snow crystals

D. solid, liquid and gas

4. Water has three states(状态). They are ____.

A. ice, snow and air    

B. solid, vapor, snow

C. drops of water, blocks of ice and crystals of water

D. solid, liquid and gas

滇东南地区某山岭重丘区高速公路工程，全长62.05km，其中山岭区长18.9km，设计行程速度60km/h，路基宽22.5m；重丘区43.15km，设计行程速度80km/h，路基宽24.5m。主要工程数量如下；土方287.5×10³m³，石方320.4×10³m³，特大桥5座，大桥20座，隧道5座，长4740m，立体交叉9处，永久占地291.79hm²，拆迁建筑物10300m²，拆迁户数58户，210人。沿途永久占用土地包括水田19.9hm²，荒地70.3hm²，经济林0.56hm²，橙杂林68.2hm²，河沟水体10.89hm²，道路1.09hm²，临时占用旱地1.04hm²，荒地125.2hm²，该项目选线横跨南盘江，在项目起点K3.0～K4.5处，经过作为当地水源地的丰收水库集水范围。

项目主要环境风险有哪些如何评价

《铁路通信维护规则（专用无线通信）》规定，八字槽型-I10mm/37mm漏泄同轴电缆使用频率在150MHZ频段时，当耦合损耗为85db时，传输损耗不大于（）。

A.30db

B.27db

C.25db

D.14db