肝颈回流征阳性见于（）。 A.右心室肥厚 B.肺气肿 C.右心衰竭 D.肝硬化 E.

Jenny doesn’t want to go swimming because she’s _____ getting into water.      [ ]

A. good at      

B. angry with    

C. terrified of      

D. interested in

_____ either you or I good at drawing?

A．Am

B．Are

C．Is

D．Do

阅读理解。

     For more than twenty years scientists have been searching for signs of life on other planets. Most of

these searches have been done over the radio. The hope is that someone in outer space may be trying

to get in touch with us. Scientists also have sent radio and television messages on spaceships traveling

through space, on the chance that someone may answer such messages.

     Scientists are using powerful radio telescopes to listen to signals from about 1, 000 stars, all within

100 light years of the earth. In addition, they will scan the entire sky to "listen" for radio messages from

more distant stars. Using a computer, they will be able to monitor more than eight channels at one time.

Scientists are looking for any signal that stands out from the background noise.

     Of the 200 billion stars in the Milky Way galaxy(银河星系), scientists find that 5% are like our sun.

Perhaps half of them have a planet like the earth. Such a planet would be a reasonable distance from the

star for temperatures to be right for the evolution(进化) of life. Based on the inhabitable(适于居住的)

planets in our galaxy, most scientists agree that chances are likely that one or more of these planets

support some life.

     However, many scientists wonder whether intelligent life exists on other planets. Some believe that

twenty years of searching without any intelligible messages shows that no one is out there. They say that

the evolution of intelligence comparable to ours is unlikely.

     Other scientists believe that our search hasn't been long enough to rule out the possibility that intelligent

life exists in our galaxy. If we hope to find intelligent life, these scientists believe that we have to keep

looking.

1. According to the passage, how many planets in our galaxy might be inhabitable?  

A. 5 billion.

B. 10 billion.

C. 15 billion.

D. 200 billion

2. The first paragraph in this passage is mainly about ________ .

A. how scientists are looking for signs of life on other planets

B. why scientists are looking for signs of life on other planets

C. where scientists are looking for signs of life on other planets

D. when scientists are looking for signs of life on other planets

3. The underlined word "monitor" in the 2nd paragraph means " ________ ".

A. find  

B. block

C. check  

D. form

4. Which of these statements is True based on the information in the passage?

A. The earth is one of the oldest planets in our galaxy.

B. Most scientists believe that there is intelligent life on other planets.

C. Scientists don't believe that there might be life on other planets.

D. Scientists are trying different ways to find signs of life on other planets.

[背景资料]
某水利工程项目分解后，根据工作间的逻辑关系绘制的双代号网络计划如下图所示。工程实施到第12天末进行检查时各工作进展如下：A、B、C三项工作已经完成，D与G工作分别已完成5天的工作量，E工作完成了4天的工作量。
[*]

按计划的最早进度，D、E、G三项工作是否已推迟推迟的时间是否影响计划工期

背景资料：

××年5月19日上午7时左右，××省高速公路第13合同段施工现场，数名作业人员带着钻杆、钻头、锤子等工具乘坐一辆农用运输翻斗车进洞爆破作业，另有2人骑摩托车随行。汽车在途中将存放在洞中的10箱（共240kg）乳化炸药、40发导爆管雷管、1捆导爆索（100m）及不少于2发电雷管等装上车。7时45分许，当汽车行驶到隧道左洞距掌子面50m、距东侧墙4m处时，汽车上的炸药突然发生爆炸，造成驾驶员、车上18人、掌子面1名施工人员共20人全部被炸身亡，2人受伤。后经查实：承包人已经将标段分包给无资质的某建筑公司；个体承包人违规借用和伪造资质承接工程，违法组织无资质的队伍和人员从事爆破作业。

根据《生产安全事故报告和调查处理条例》的规定，此次事故属于较大事故。