肺火或外感风热，可见（） A．白睛发红  B．两眦赤痛  C．睑缘赤烂  D．全目赤

安全防护员必须坚守岗位，精力集中，加强（），严格纪律。

A.锻炼

B.瞭望

C.学习

C

A scientist working at her lab bench and a six-old baby playing with his food might seem to have little in common.After all,the scientist is engaged in serious research to uncover the very nature of the physical world,and the baby is,well, just playing…right?Perhaps,but some developmental psychologists()have argued that this“play”is  more like a scientific investigation than one might think.

Take a closer look at the baby playing at the table.Each time the bowl of rice is pushed over the table edge,it

falls in the ground---and, in the process, it belongs out important evidence about how physical objects interact ; bowls of rice do not flood in mid-sit, but require support to remain stable. It is likely that babies are not born knowing the basic fact of the universe; nor are they ever clearly taught it. Instead, babies may form an understanding of object support through repeated experiments and then build on this knowledge to learn even more about how objects interact. Though their ranges and tools differ, the baby’s investigation and the scientist’s experiment appear to share the same aim(to learn about the natural world ), overall approach (gathering direct evidence from the world), and logic (are my observations what I expected?).

Some psychologists suggest that young children learn about more than just the physical world in this way---that they investigate human psychology and the rules of language  using similar means. For example, it may only be through repeated experiments, evidence gathering, and finally overturning a theory, that a baby will come to accept the idea that other people can have different views and desires from what he or she has, for example, unlike the child , Mommy actually doesn’t like Dove chocolate.

Viewing childhood development as a scientific investigation throws on how children learn ,but it also offers an inspiring look at science and scientists. Why do young children and scientists seem to be so much alike? Psychologists have suggested that science as an effort ---the desire to explore, explain, and understand our world---is simply something that comes from our babyhood. Perhaps evolution provided human babies with curiosity and a natural drive to explain their worlds, and adult scientists simply make use of the same drive that served them as children. The same cognitive systems that make young children feel good about feel good about figuring something out may have been adopted by adult scientists. As some psychologists put it, ”It is not that children are little scientists but that scientists are big children.”

Children may learn the rules of language by（）

A. exploring the physical world

B. investigating human psychology

C. repeating their own experiments

D. observing their parents’ behaviors

小强同学的文具盒丢了，老师和同学怀疑是小明偷去了，小明怎么也解释不清楚，小明同学的下列做法正确的是[ ]

A．与老师顶撞，说明委屈 

B．与同学打架，把事情摆平  

C．回家用适当方式宣泄自己心中的委屈，再找机会与同学和老师解释清楚 

D．同学和老师对自己不公平，下次去偷同学东西来宣泄不平

下列化学方程式中属于复分解反应的是[ ]

A．C＋O₂CO₂

B．H₂CO₃==H₂O＋CO₂↑

C．H₂＋CuOCu＋H₂O            

D．HCl＋AgNO₃==AgCl↓＋HNO₃

材料一：2009年7月2日至7日，中 * * 政治局常委、全国人民代表大会委员长吴邦国在安徽调研。他先后来到了芜湖、马鞍山、铜陵、安庆、合肥等地，深入企业车间、科研院所、大专院校、农村地头，亲切看望在高温酷暑下奋战的工人、农民，直接听取基层干部群众的意见，共话应对危机之策，共商持续发展大计。

材料二：在皖北考察时吴邦国强调，要坚持以科学发展观为指导，认真贯彻落实中央的方针政策和战略部署，在努力保持经济平衡较快发展的同时，把应对国际金融危机冲击、克服当前困难与实现可持续发展有机结合起来，加快结构调整、促进产业结构升级、发展低碳经济、促进节能减排，振兴皖北经济、促进区域协调发展。

材料一体现了历史唯物主义的什么道理？