作为消费者，总是希望质优价廉；作为经营者，则强调优质优价。尽管两者关注点有所不同，但

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 pro-gram then exaggerated the ways in which female faces differ from male faces, creating, in human-beauty-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, re-searchers 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. \

Through a few tiny changes made by Johnston, the synthesized face became even more ______.

A．masculine

B．average

C．feminine

D．neutral

提速道岔空转经过（）时间，自动切断电源，经操纵后能返回原来的位置。

A.3min

B.3s

C.30s

《郑伯克段于鄢》选自《战国策》。

某家庭准备以抵押贷款方式购买一套住房。该家庭月总收入7000元，最多能以月总收入的25%支付住房贷款的月还款额。年贷款利率为6%，最长贷款期限20年，最低首付款为房价的30%，若采用按月等额偿还方式，问：

（1）该家庭能购买住房的最高总价是多少若第5年年末银行贷款利率上调为9%，为保持原月偿还额不变，则：

（2）该家庭需在第6年年初一次性提前偿还贷款多少元？

（3）如果不提前偿还贷款，则需将贷款期限延长多少年？

了解临界转速的目的在于设法让压缩机的工作转速避开（）以免发生（）。