Invent challenges. A hundred years ago, pi

科举制在一定程度上体现了公开公平地选拔人才，它正式创立于[ ]

A．隋文帝时期

B．隋炀帝时期

C．唐太宗时期

D．武则天时期

营养不良患儿最常见的并发症（）。

A.营养性贫血

B.上呼吸道感染

C.支气管肺炎

D.鹅口疮

E.腹泻

Honesty is the best policy, as the English saying goes. Unfortunately, honesty often deserts us when no one is watching, British psychologists reported last week.

Researchers at UK’s Newcastle University set up an experiment in their psychology department’s coffee room. They set a kettle, with tea, coffee and milk on the counter and hung up a sign listing the prices for drinks. People helping themselves to a cup of drink were supposed to put a few cents in the box nearby. The scientists hung a poster above the money box, and it changed each week between images of gazing eyes and pictures of flowers. The researchers found that staff paid 2.76 times more for their drinks when the image of the eyes was hung. "Frankly we were shocked by the size of the effect," said Gilbert Roberts, one of the researchers.

Eyes are known to be a powerful perceptual (感官的) signal for humans. "Even though the eyes were not real, they still seemed to make people behave more honestly," said Melissa Bateson, a behavioral biologist and leader of the study.

Researchers believe the effect sheds light on our evolutionary past. It may arise from behavioral features that developed when early humans formed social groups to strengthen their chances of survival For social groups to work, individuals had to co-operate, rather than act selfishly. "There’s an argument that if nobody is watching us, it is in our interests to behave selfishly. But when we’re being watched we should behave better. So people see us as co-operative and behave the same way towards us," Bateson said.

The new finding indicates that people have a striking response to eyes. That might be because eyes and faces send a p biological signal we have evolved to respond to. The finding could be put to practical use, too. For example, images of eyes could increase ticket sales on public transport and improve supervision systems to prevent antisocial behavior.

The experiment conducted in Newcastle University shows that ().

A. people enjoy free drinks more than paid ones

B. most people are dishonest if nobody is watching

C. people like pictures of flowers more than pictures of eyes

D. people are more honest when watched by pictures of eyes

下列哪一项不属于HRDA的空重车自动调整阀的结构。（）

A、作用压力给排阀

B、电磁流量控制阀

C、空气簧压力检测部

D、支点调整部

下列有关生长发育不平衡性的说法不正确的是（）

A.在整个生长发育阶段，开始发育的速度是不均一的

B.各器官、组织生长发育的速度也是不等同的

C.小儿生长发育可见身高和体格明显增大的两个高峰期

D.生长发育的两个高峰期：一个是儿童期，一个是青春期

E.器官功能发育是不等速的，是与其功能需要相适应的