灯光中的Shadow Color属性有何作用？（） A.改变阴影强度 B.改变阴影颜

阅读下面的短文，回答以下问题。

①细菌和病毒都是可以致病的微生物，但它们的特征区别很大。细菌虽然小，要在光学显微镜下才能看得见，但它除了拥有生命的基本单位核酸之外，还有一大套赖以生存的配套设施。包括作为居住“公馆”的细胞壁，储存营养物质的“仓库”，以及进行新陈代谢的“化工车间”。依靠这些，细菌能够摄取外界的物质并加工成需要的能量。

②而病毒就更小了，也可怜得多，且不奢谈“库房”和“车间”，就连作为保护外壳的“茅草房”也没有。实际上它只有一个分子大小，用电子显微镜才能看得见。整个家当也只是一条表示生命的核酸而已。如果拿人来做比喻，细菌最起码也有条裤子，有只讨饭碗，有根打狗棒。所以细菌虽然必须在人体内部的良好环境中才能繁殖，但处在恶劣环境中仍能生存较长的一段时间。而病毒则像个刚出生的婴儿，除了它的生命和一张吃奶的嘴外便一无所有，毫无独立生存的能力。因而病毒只能寄生在人或动物的细胞内部，靠“窃取”细胞里的现成营养才能生存。一旦被排出体外，病毒就活不了几小时。

③大部分抗生素对细菌起作用，是因为抗生素可以抑制细胞繁殖，干扰它们形成新的遗传结构或者细胞壁。而正因为病毒只能寄生在别人的细胞内，自己不能完成这些生化反应，所以抗生素对病毒全无作用。

④结构这样简陋的病毒算不算是生命这是个值得讨论的问题。生命必须具备的条件有两条：能进行新陈代谢和自我复制。从这点来说病毒具备了生命的重要特征。但它又不是完整的生命，因为所有生物体的生命特征都寓藏于DNA的双螺旋链中，唯独病毒没有双螺旋，而只有一条单链，有时还不是DNA而是RNA，所以病毒只具备了部分的生命特征。因而病毒不属于生物界共同的生命形式，或者说只是一种残缺不全的生命形式。

⑤病毒的生存能力既然这么弱，为什么还会那样猖獗呢例如埃博拉的感染力极强，病死率可达80%。实际上大多数病毒远没有那么可怕，有的也不会使人得病。冠状病毒本来致病的能力并不强，问题在于“变种”上。变异的病毒和原来的不同了，它可能是无害的，但也可能变成“杀伤力”更大的病毒。然而我们不必担心它会因反复变异而使杀伤力次第增大。因为就杀伤力而言，变异就像赌博，总是有输有赢，不断地赢下去的几率是微乎其微的。至少有史以来还没有过这样的记录。如果有过，可能现在就没有我们的存在了。

⑥必须指出的是杀伤力的大小不仅取决于病毒一方，更重要的是人群的免疫力。变种冠状病毒之所以为患甚大，很重要的一个因素是人类还没有接触过这样变种后的新病毒。当人群有足够多的人产生了抗体之后，这种病毒对人类的威胁也就小得多了。

对原文内容理解不正确的一项是（）。

A．孔孟观念中的“天”是个模糊概念，它仅指神。“天”作为宇宙的本体，是宋明理学阶段确立的

B．中国知识分子的宗教思想相当淡薄，这与孔子始终强调“人”及儒教在中国文化中占主要地位有密切关系

C．说中国自占是“他律”，服从于外界的压力、管束，说西方文化是自律，这是不恰当的

D．孔子说“君子和而不同”，意思是君子做事讲和谐，即用正确意见去纠正错误意见，达到恰到好处，而不是人云亦云，盲目服从

钙拮抗剂（）.

A．变态反应

B．后遗效应

C．毒性反应

D．特异质反应

E．副作用

Two new studies suggest that modern running shoes could increase the risk of injuries to runners.

One study involved sixty-eight healthy young women and men who ran at least twenty-four kilometers a week. The runners were observed on a treadmill machine (跑步机). Sometimes they wore running shoes. Other times they ran barefoot (赤脚).

Researchers from the JKM Technologies company in Virginia, the University of Virginia and the University of Colorado did the study.

They found that running shoes create more stress that could damage knees, hips and ankle joints than running barefoot. They observed that the effect was even greater than the effect reported earlier for walking in high heels.

The study appeared in the official scientific journal of The American Academy of Physical Medicine.

The other study appeared in the journal Nature. It compared runners in the United States and Kenya. The researchers were from Harvard University in Massachusetts, Moi University in Kenya and the University of Glasgow in Scotland.

They divided the runners into three groups. One group had always run shoeless. Another group had always run with shoes. And the third group had changed to shoeless running.

Runners who wear shoes usually come down heel first. That puts great force on the back of the foot. But the study found that barefoot runners generally land on the front or middle of their foot. That way they ease into their landing and avoid striking their heel.

Harvard’s Daniel Lieberman led the study. He says the way most running shoes are designed may explain why those who wear them land on their heels. The heel of the shoe is bigger and heavier than other parts of the shoe, so it would seem more likely to come down first. Also, the heel generally has thick material under it to soften landings.

But the researchers do not suggest that runners immediately start running barefoot. They say it takes some training. And there can be risks, like running when your feet are too cold to feel if you get injured.

The study was partly supported by Vibram, which makes a kind of footwear that it says is like running barefoot. The findings have gotten a lot of attention. But the researchers say there are many problems in the way the press has reported in their paper. So they have tried to explain their findings on a Harvard Website.

小题1:What’s the main idea of the passage?

A．Walking in high heels could cause less serious effects than running barefoot.

B．Two new discoveries encourage people to run in high heels.

C．Running in shoes is partly good to runners.

D．Two new studies prove running without shoes is beneficial to runners in most cases.小题2:Which part of our body could be injured if we run in running shoes?

A．Toes.

B．Hips.

C．Feet.

D．Legs.小题3:What can we learn from the passage?

A．The way that we run by landing on the front or middle of our foot could avoid damaging our heel.

B．We should start running barefoot in no time.

C．Running in modern running shoes could cause more serious effects than running in high heels.

D．We won’t be injured if we run barefoot.小题4:What is the writer’s attitude towards the use of the modern running shoes?

A．Persuasive.

B．Negative.

C．Objective.

D．Supportive.

肺炎球菌肺炎抗菌治疗首选（）。

A.链霉素

B.氧氟沙星

C.青霉素

D.丁胺卡那

E.红霉素

首次公开发行股票时，上市公司应当建立募集资金专项存储制度，募集的资金无需存放于公司董事会决定的专项账户。( )