如图是显微镜结构图,请据图回答: (I)用来调节光线强弱的结构是[7]遮光器和[

题型:填空题

问题:

如图是显微镜结构图,请据图回答:

(I)用来调节光线强弱的结构是[7]遮光器和[______]______.

(2)转动时,能使镜筒升降幅度较大的结构是[______]______.

(3)接近片标本的镜头是[______]______.

(4)把玻片标本放在[5]______ 上后,要用[8]压片夹压住,标本要正对[6]______的中央.

考点:显微镜的构造和使用
题型:填空题

BEIJING - By the end of 2011 China-made supercomputers will say goodbye to foreign microchips(微芯片) and start using their own "Chinese core(核心)", according to one of the country's leading scientists, Hu Weiwu.

Hu told reporters on Saturday that the "Dawning 6000" supercomputer, developed by the Institute of Computing Technology of CAS and the Dawning Information Industry Company (DIIC), will adopt Loongson microchips for the first time as its core parts. It will have a computing speed of more than 1,000 trillion operations a second.

Making supercomputers with Chinese microchips is one of the nation's major science and technology projects. Three organizations - the Institute of Computing Technology of CAS, Jiangnan Institute of Computing Technology and the National University of Defense Technology (NUDT) - have their own supercomputer projects.

According to their schedules, all three institutions will need to meet the target of using domestically(国内的) developed microchips by the end of this year. Hu said the new supercomputer will use fewer than 10,000 Loongson microchips, and will also be more energy-efficient.

Tianhe-1A, developed by NUDT in Hunan's provincial capital Changsha, is the fastest supercomputer in the world. However, Tianhe-1A largely runs on 14,336 CPUs made by Intel, and 7,186 GPUs (processing units) from Nvidia, two US chip-makers.

Hu said there will be difficulties ahead as there is little affiliated equipment specially developed for these supercomputers. "We have enough supercomputers in China but still can't make full use of them," He said.

Hu added that although the China-made CPUs have improved since they were first produced in 2002, they have a long way to go to compete with US chip-makers such as Intel.

小题1:What’s the best title for this passage?

A.The Arrival of Chinese Supercomputers

B.Homemade CPUs with a Long Way to Go

C.The Supercomputers of Three Organizations in China

D.Homemade CPUs on the Way for Local Supercomputers小题2:What will raise the speed to more than 1,000 trillion operations a second.?

A.Dawning 6000

B.Loongson microchips

C.DIIC

D.Tianhe-1A小题3:What do we know about Tianhe-1A?

A. Not all the parts of Tianhe-1A are made by China.

B. Tianhe-1A is developed by CAS and DIIC.

C. Tianhe-1A will use fewer than 10,000 Loongson microchips.

D. NUDT has produced a most powerful supercomputer in China.

小题4:The underlined word “affiliated” can be replaced by_______.

A.cheap

B.suitable

C.expensive

D.modern

题型:填空题

从所给的四个选项中,选择最合适的一个,使之呈现一定的规律性。()

A.A

B.B

C.C

D.D

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《汉书》记载:“今法律贱商人,商人已富贵;尊农夫,农夫已贱矣”。这段话表明当时()

①重农抑商

②商业比农业更能获利

③商人在政治法律上受歧视

④农民在政治法律上受尊重保护

⑤农民比商人更有社会地位

A.①②③④

B.①③④

C.①②③

D.②③

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铁路货车的辅修周期一般是()个月。

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Lilienfeld病因定义

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