正电子湮没的实验方法与哪些？

患者，女，35岁，产后50天，自觉乏力，自汗，少气懒言，面色苍白，舌质淡，脉细弱，处方中有党参、黄芪、当归、茯苓、山药、甘草。

下列各项，属于道地药材的是（）。

A.内蒙古的黄芪

B.湖南的党参

C.宁夏的甘草

D.广东的山药

E.河南的当归

截至2008年6月底，深圳市各区所有居委会都已完成选举。各区实行居委会直接选举比例超过八成。深圳寄望通过此次更大比例的直选，让居委会真正回归本位。居委会的本位是

①城市居民自我管理、自我教育、自我服务的基层群众性自治组织    ②提高居民参与政治生活的能力   ③自主维护社会治安，反映居民意见的机构   ④管理居民的公共事务和公益事业的机构

A．①②③

B．②③④

C．①②④

D．①③④

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. \

Paragraph 4 suggests that human beauty may be ______.

A．culturally different

B．a disease-free idol

C．individual-dependent

D．a world agreed value

2岁小儿外伤致股骨干骨折，较为合适的治疗方案为（）

A.切开复位内固定

B.闭合复位外固定支架固定

C.悬吊牵引

D.骨牵引

E.手法复位，石膏外固定

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