下列投影法中，能准确地反映物体实形，且作图简便，容易掌握的是( )。A．中心投影B

能源是人类生存和发展的重要支撑因素，请回答下列有关能源的问题：

（1）人类目前所利用的能量大部分来源于太阳能，捕获太阳能的生物主要是绿色植物，绿色植物通过光合作用把水和二氧化碳转化为葡萄糖的同时，将太阳能转化为______能储存起来．

（2）许多植物的茎、叶的主要成分是纤维素[化学式为（C₆H₁₀O₅）n．]，在某种细菌的作用下可发生如下反应：（C₆H₁₀O₅）n+nH₂O

细菌

3nCO₂+3nCH₄+能量．请你设想出这一反应的一种实际意义______．

要鼓励动员群众以（）身份参与防空防灾救援演练。

A、志愿者 

B、公民 

C、社区居民 

D、个人

史学界普遍认为：1861年改革是俄国历史上的重要转折点。得出这一认识的主要依据是[ ]

A．改革使俄国摆脱了民族危机

B．改革使农奴无偿获得了土地

C．改革使俄国走上资本主义的发展道路

D．改革废除了沙皇统治

患儿，女，9岁，因上感后出现水肿，初为颜面，渐及全身，经泼尼松足量并间断应用呋塞米治疗，病情一度好转，2周前出现腰痛伴血尿，水肿加重，并出现腹水，近4天不能下地活动。血压120／80mmHg，尿蛋白（+++），潜血（+++），尿素氮10.8mmL／L，血胆固醇11.5mmoL／L，血浆白蛋白20g／L。

为进一步确诊的首要检查是（）

A.IVP

B.血浆纤维蛋白原

C.肾血管造影

D.24小时尿蛋白定量

E.肾功能

Do animals have a culture What do we mean by "culture" Lately social scientists have begun to ask if culture is found just in humans, or if some animals have a culture too. When we speak of culture, we mean a way of life a group of people have in common. Culture includes the beliefs and attitudes we learn. It is the patterns of behavior that help people to live together. It is also the patterns of behavior that make one group of people different from another group.
Our culture lets us make up for having lost out strength, claws, long teeth, and other defenses. Instead we use tools, cooperate with one another, and communicate with language. But these aspects of human behavior, or "culture," can also be found in the lives of certain animals. Animals can make tools, for example. We used to think that the ability to use tools was the dividing line between human beings and other animals. Lately, however, we have found that this is not the case. Chimpanzees(黑猩猩) can not only use tools but actually make tools themselves. Animals can also share knowledge with each other and use their own language to communicate. So it may be important for us to know that the line dividing us from animals is not as clear as we used to think.

"Culture" refers to ______.

A．the book language of behavior we learn

B．the patterns of behavior we learn

C．traditional ideas

D．people’s good habits