钢直尺可用于测量（）的尺寸。 A.特殊工件 B.一般工件 C.特种工件 D.精密工件

（）规定信令数据链路的物理、电气和功能特性，确定与数据链路连接方法。

A.信令数据链路

B.信令链路功能

C.信令网络功能

D.事务处理能力应用

依次填入下面一段文字中横线处的语句，与上下文衔接最恰当的一组是[ ]

         如果说，西汉是宫廷皇帝的艺术，以__________为特征，魏晋六朝是门阀贵族的艺术，以转向人的内心、性格和思辨为特征，那么唐代也许恰似这两者统一的向上一环：既不纯是__________，也不只是__________，而是__________。一种丰满的、具有青春活力的热情和想象，渗透在盛唐文艺之中。即使是__________，也仍然__________。这就是盛唐艺术。

①外在事物、人物活动的夸张描写

②对有血有肉的人间现实的肯定和感受、憧憬和执著

③享乐、颓废、忧郁、悲伤

④铺张陈述人的外在活动和对环境的征服

⑤闪烁着青春、自由和欢乐

⑥内在心灵、思辨、哲理的追求

A．⑤②③④①⑥

B．④①⑥②③⑤

C．①③⑥⑤②④

D．⑥⑤①②④③

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 Johnson synthesized a new face by combining the features of 16 ______.

A．beautiful European women

B．different women around the world

C．casually chosen white women

D．ordinary western women

如何保证饲料加工混合质量？

OFDM的主要缺点有哪些？