局部封闭的方式有几种各是什么名称

2003年企业在境内应纳所得税为 ( )万元。

A．33

B．2.25

C．31.35

D．31

化学在材料的发展过程中起着很重要的作用，2012年度国家最高科学技术奖授予郑哲敏院士、王小谟院士，两人均在材料方面作出了巨大贡献，为国家创造出较大的经济效益。

（1）石灰石、生石灰和熟石灰均是重要的化工原料，下列工业生产中，不可能用到上述原料的是________(填序号)。

①炼铁；②炼钢；③从海水中提取镁；④铝的冶炼；⑤制水泥；⑥制玻璃；⑦制漂白粉；⑧烧制陶瓷

（2）神州八号与天宫一号的成功对接与分离，标志着我国航天工业发展进入了新阶段。下列选项中的描述与化学研究领域无关的是________。

A．燃料燃烧为神州八号升空提供动力

B．与地面指挥中心联系的无线电通讯

C．宇航服使用的合成纤维等新材料

D．太空舱中利用NiFeO₄处理呼出的废气（3）玻璃钢是将玻璃纤维和高分子材料复合而成的复合材料，它具有强度高、质量轻、耐腐蚀、抗冲击、绝缘性能好等优良性能，其中基体是__________，增强体是________。

（4）橄榄石型LiFePO₄是一种锂离子电池正极材料，其中Fe元素显＋2价。常向LiFePO₄中加入少量活性炭黑，其作用除了可以改善LiFePO₄的导电性能外，还能____________________。

行政追偿

In the following passage, there are 20 blanks representing the words that are missing from the context. You are to put back in each of the blanks the missing word． The time for this section is 20 minutes.
Where do you really come from And how did you get (1) where you live today DNA studies suggest that all humans today (2) from a group of African ancestors who—about 60,000 years ago— (3) a remarkable journey.
The Genographic Project is seeking to chart new (4) about the migratory history of the human species by (5) sophisticated laboratory and computer analysis of DNA contributed by hundreds of (6) of people from around the world． In this unprecedented and real-time (7) effort, the Genographic Project is closing the gaps of what science (8) today about mankind’s ancient migration stories.
The Genographic Project is a five-year (9) partnership led by National Geographic Explorer-in-Residence Dr. Spencer Wells. Dr. (10) and a team of renowned international scientists and IBM researchers, are (11) cutting-edge genetic and computational technologies to analyze historical patterns in DNA (12) participants around the world to better understand our human genetic roots. (13) three components of the project are: to gather field research data (14) collaboration with indigenous and traditional peoples around the world; to invite (15) general public to join the project by purchasing a Genographic Project Public Participation Kit; (16) to use proceeds from Genographic Public Participation Kit sales to further (17) research and the Genographic Legacy Fund which in (18) supports indigenous conservation and revitalization projects. The Project is anonymous, non-medical, (19) , non-profit and non-commercial and all results will be placed in the (20) domain following scientific peer publication.

在流体系统中，用来控制流体流动方向的阀门是（）。

A、分配阀

B、溢流阀

C、安全阀

D、截止阀