分布式DDC的配置通常由主控模块和（）构成。 A．电源模块 B．通讯模块 C．I/O

下列属于垂直传播方式的是（）

A.血友病患者使用进口Ⅷ因子而感染HIV

B.受感染的孕妇经胎盘将病原体传给胎儿引起宫内感染

C.在没有外界因素参与下，传染源直接与易感者接触的一种传播途径

D.吸血节肢动物通过叮咬血液中带有病原体的感染者再感染易感者

E.实验室内因吸入含病原体的气溶胶而感染SARS

新杰公司是一上市公司，罗某是该公司的董事。2011年1月，新杰公司投入大量资金研发出某新产品，并且获得了专利。同年6月，松德公司在未经新杰公司许可的情况下，擅自使用该专利技术进行生产，严重侵犯了新杰公司的专利权，给新杰公司造成了重大损失，但新杰公司一直怠于对松德公司提起诉讼。

若该上市公司欲回购本公司股东股份，下列说法正确的有(　)。

A．公司章程规定的解散事由出现，股东大会会议通过决议修改章程使公司存续的，表示异议的股东有权要求公司收购其股份

B．股东对股东大会作出的减少公司注册资本的决议持有异议的，可以要求公司回购其股票

C．为将股份奖励给本公司职工而收购本公司的股票，不得超过本公司已发行股份总额的5%；用于收购的资金应当从公司的税后利润中支出；所收购的股份应当在一年内转让给职工

D．为减少公司注册资本而收购本公司的股票，应当自收购之日起10日内注销

E．股东因对股东大会作出的公司合并、分立决议持异议，要求公司收购其股份的，公司应当在6个月内转让或者注销

高炉煤气中惰性气体约占（）以上，因而火焰较长，焦饼上下加热的均匀性较好。

A、30%

B、40%

C、50%

D、60%

高山病常见临床表现有哪些？

After Man has dreamed about flying for a long time. Michael Moshier is a dreamer. He invented the Solo Trek.

The Solo Trek had a 120 horsepower engine with twin fans. Only one person flies. As you fly above the roofs, you lean a little forward. You can see everything under you. You are flying like Superman.

Michael Moshier looked at the jet belt and the rocket belt that was developed 20-30 years ago. Nothing ever came from them. People still can’t fly.

Inventors have tried to make it easy for people to fly. Paul Moller has been working on his flying car for 30 years. He now says it is ready for tests. It would take off and land vertically, go 600 miles an hour, and deliver 20 miles to the gallon. A computer would do the actual flying. He says it could be sold next year for about a million dollars.

NASA is working with Moshier to help develop his flying machine. The first users are likely to be military.

It’s been 50-years since Robert Fulton invented his airphibian, a flying car. It flew, and is now in the Smithsonian Museum.

Getting dreams to fly is never easy.

An analogy was used to compare the way one could fly in the Solo Flyer to ()

A. how a helicopter flies

B. how the Jetsons fly

C. how the airphibian flies

D. how Superman flies