在保护鸟类的多样性方面，下列哪一项属于不良行为（）。A.挂人工巢箱； B.树立栖木；

(-4)2 =______； 3 (-6)3 =______；( 196 )2=______．

“我在这里祈祷，也在这里迷惘；我在这里寻找，也在这里失去；我在这里活着，也在这里死去。”歌手汪峰的一曲《北京 北京》，令无数北漂潸然泪下，同时也激励着他们追逐梦想。这体现了

①意识活动具有计划性和相对独立性　②意识对人的生理活动具有调节和控制作用

③思维和存在具有同一性             ④文学作品是对人民群众生活的真实再现

A．②③

B．①②

C．①④

D．③④

多彩的“碳”，多姿的生活，让我们一起走进“碳”的世界。

（1）根据表1提供的信息，填写有关含碳物质的对应特性。

物质用途	金刚石切割玻璃	石墨作电极	活性炭净水
对应特征	①	②	③

              表1

（2）液态二氧化碳灭火器可用于扑救档案资料室发生的火灾，下列说法正确的有           （填标号）。

A．液态二氧化碳气化后不会污染档案资料

B．二氧化碳可覆盖在燃烧物表面，隔绝空气

C．液态二氧化碳气化时吸热，降低了可燃物的着火点

（3）过多的二氧化碳加剧了“温室效应”，写出一条减少二氧化碳排放的建议                 。

（4）二氧化碳是一种宝贵的资源。固定和利用二氧化碳的一个成功范例是：在高温高压下，CO₂和NH₃可以合成尿素[CO（NH₂）₂]，同时生成水。该反应的化学方程式为                       。

（5）目前，人类以化石燃料为主要能源。化石燃料有煤、          和天然气，它们都属于         （填“可再生”或“不可再生”）能源。

（6）天然气中甲烷完全燃烧的化学方程式为                             。

（7）从表2数据分析，与煤相比，用天然气作燃料的优点有              。

	1g物质完全燃烧
	产生二氧化碳的质量/g	放出的热量/kJ
甲烷	2.75	56
碳	3.67	32

She’s cute, no question. Symmetrical features, flawless skin, looks to be 22 years old—entering any meat-market bar, a woman lucky enough to have this face would turn enough heads to stir a breeze. But when Victor Johnston points and clicks, the face on his computer screen changes into a state of superheated, crystallized beauty. "You can see it. It’s just so extraordinary," says Johnston, a professor of biopsychology at New Mexico State University who sounds a little in love with his creation.
The transformation from pretty woman to knee-weakening babe is all the more amazing because the changes wrought by Johnston’s software are, objectively speaking, quite subtle. He created the original face by digitally averaging 16 randomly selected female Caucasian faces. The changing program then exaggerated the ways in which female faces differ from male faces, creating, in humanbeauty-science field, a "hyper-female". The eyes grew a bit larger, the nose narrowed slightly and the lips plumped. These are shifts of just a few millimeters, but experiments in this country and Scotland are suggesting that both males and females find "feminized" versions of averaged faces more beautiful.
Johnston hatched this little movie as part of his ongoing study into why human beings find some people attractive and others homely. He may not have any rock-solid answers yet, but he is far from alone in attempting to apply scientific inquiry to so ambiguous a subject. Around the world, researchers are marching into territory formerly staked out by poets and painters to uncover the underpinnings of human attractiveness.
The research results so far are surprising—and humbling. Numerous studies indicate that human beauty may not be simply in the eye of the beholder or an arbitrary cultural artifact. It may be ancient and universal, wrought through ages of evolution that rewarded reproductive winners and killed off losers. If beauty is not truth, it may be health and fertility: Halle Berry’s flawless skin may fascinate moviegoers because, at some deep level, it persuades us that she is parasite-free.
Human attractiveness research is a relatively young and certainly contentious field—the allure of hyper-females, for example, is still hotly debated—but those on its front lines agree on one point: We won’t conquer "looks-ism" until we understand its source. As psychologist Nancy Etcoff puts it: "The idea that beauty is unimportant or a cultural construct is the real beauty myth. We have to understand beauty, or we will always be enslaved by it. \

Victor Johnston has produced such an attractive face in order to ______.

A．give his computer a beautiful screen

B．study the myth of human attractiveness

C．prove the human capacity to create beauties

D．understand why Caucasian faces are special

根据花坛的外形轮廓可以分为（）、自然式、混合式几种类型。