直流稳压电源中，整流电路的作用是（）。 A.将交流电压变成脉动直流电压 B.将220

男性农民，20岁。1月初入院，5天前突起寒战、高热、全身酸痛、恶心、呕吐，排洗肉水样尿200ml。体温39.5℃，眼睑水肿，眼睑及胸部皮肤充血，腋部可见针尖大出血点，臀部注射处有1cm×2cm大小淤斑。血象：血红蛋白160g/L，红细胞数5.1×10¹²/L，白细胞数64×10⁹/L，幼稚细胞0.12，杆状核细胞0.15，多形核细胞0.43，淋巴细胞0.30，血小板80×10⁹/L。最可能的诊断是（）

A.急性白血病

B.慢性粒细胞性白血病

C.血小板减少性紫癜

D.急性肾炎

E.流行性出血热

凡通过他人来认领遗留物品时，须问清客人姓名、遗失物品、（）、遗失时间、所有资料相符时才可把物品交给来人，并叫来人签名代收。

A、来人单位

B、客人联系方式

C、遗失地点

D、来人身份

下列有关网关的概述，最合适的是

A．网关既可用于扩展网络，又能在物理层上实现协议转换

B．网关可以互连两个在数据链路层上使用不同协议的网络

C．网关与其他的网间连接设备相比，有更好的异种网络互连能力

D．网关从一个网络中读取数据，去掉该数据的原协议栈，而用另一个网络协议栈来封装数据

Tragedies have a way of making people rethink their (1) and find a new focus. They make people think about what a society needs in order to (2) . The notion of doing something to take control of society or of our fate as humans might be dated back to ancient times of the (3) . Now, in the early 21st century, " social (4) " are trying to take back some (5) over society’s direction once again. A social inventor is not necessarily a social (6) , a social (7) or someone who works in a (8) industry or invents new (9) and consumer products. A social inventor is using the power of (10) thinking, to come up with ideas for (11) in certain communities or sections of society. They have a vision of a (12) world and create new systems or practices. Their ideas may seem (13) or impossible. They are usually quite (14) people. But some of these creative thinkers have (15) and quietly changed the way we live. Social inventions do not have to be (16) . Sometimes they are new (17) for neighborhoods or communities, or even very (18) ideas. The idea of social inventions has become so popular in recent years. It shows how much people desire to make a (19) in our society and not remain (20) .

Tragedies have a way of making people rethink their (1) and find a new focus. They make people think about what a society needs in order to (2) . The notion of doing something to take control of society or of our fate as humans might be dated back to ancient times of the (3) . Now, in the early 21st century, " social (4) " are trying to take back some (5) over society’s direction once again. A social inventor is not necessarily a social (6) , a social (7) or someone who works in a (8) industry or invents new (9) and consumer products. A social inventor is using the power of (10) thinking, to come up with ideas for (11) in certain communities or sections of society. They have a vision of a (12) world and create new systems or practices. Their ideas may seem (13) or impossible. They are usually quite (14) people. But some of these creative thinkers have (15) and quietly changed the way we live. Social inventions do not have to be (16) . Sometimes they are new (17) for neighborhoods or communities, or even very (18) ideas. The idea of social inventions has become so popular in recent years. It shows how much people desire to make a (19) in our society and not remain (20) .

用于称量行驶中铁路货车载重的轨道衡是（）。

A、电子轨道衡

B、机械轨道衡

C、动态轨道衡

D、静态轨道衡