我国目前最大的养殖珍珠是1981年海南省陵水黎族自治县养殖出的一颗白蝶贝珍珠,它的直

题型:单项选择题

问题:

我国目前最大的养殖珍珠是1981年海南省陵水黎族自治县养殖出的一颗白蝶贝珍珠,它的直径是多少()

A.15.5×19CM

B.10×20CM

C.17.6×18CM

考点:海南知识竞赛海南国际旅游岛知识竞赛海南国际旅游岛知识竞赛题库
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以下关于工程量清单计价的说法,不正确的是()。

A.工程量清单是招标人提供的一个投标报价的平台

B.投标人应根据现行定额的消耗量和市场价进行投标报价

C.投标人应根据自身的技术、财力、管理能力投标报价

D.招标人根据具体的评标细则评标

题型:单项选择题

输尿管结石()
膀胱结石()
输尿管末端结石()
* * 损伤()
膀胱结核()

A.肾区绞痛伴镜下血尿

B.排尿中断伴疼痛

C.尿频、尿急伴镜下血尿

D.尿频、尿急、尿痛伴终末血尿及脓尿

E. * * 口滴血

题型:单项选择题

阅读理解。

     Unusual incidents are being reported across the Arctic. Inuit (因纽特人) families going off on

snowmobiles to prepare their summer hunting camps have found themselves cut off from home by a sea

of mud. There are also reports of sea ice breaking up earlier than usual, carrying seals beyond the reach

of hunters. Climate change may still be a rather abstract idea to most of us, but in the Arctic it is already

having great effects-if summertime ice continues to shrink at its present rate, the Arctic Ocean could soon

become almost ice-free m summer. The knock-on effects are likely to include more warming, cloudier

skies, and higher sea levels. Scientists are increasingly eager to find out what's going on in the Arctic.

     For the Inuit the problem is urgent. They live in unsteady balance with one of the toughest environments

on earth. Climate change, whatever its causes, is a direct danger to their way of life. Nobody knows the

Arctic as well as the locals, which is why they are not content simply to stand back and let outsider experts

tell them what's happening. In Canada, where the Inuit people are trying hard to guard their hard-won

autonomy in the country's newest land, Nunavut, they believe their best hope of survival in this changing

environment lies in combining their ancestral knowledge with the best of modern science. This is challenge

in itself.

     The Canadian Arctic is a vast, treeless polar desert that's covered with snow for most of the year.

Adventure into this area and you get some idea of the hardships facing anyone who calls-this home. Farming

is out of the question and nature offers few pickings. Humans first settled in the Arctic a mere 4,500 years

ago, surviving by taking advantage of sea fish. The environment tested them to the limits: sometimes the

settlers were successful, sometimes they failed and disappeared. But around a thousand years ago, one group

appeared that was uniquely well adapted to deal with the Arctic environment. These Thule people moved in

from Alaska, bringing dogs, iron tools and the like. They are the ancestors of today's Inuit people.

1. Which of the following is not likely to be the effect of climate change?[ ]

A. Shorter and shorter summertime. 

B. Ice-free summer around the Arctic.

C. Higher sea levels.

D. More cloudy skies.

2. The Inuit people believe the solution to the climate change problem is _____. [ ]

A. to change their way of life

B. to use their ancestral knowledge

C. to make the best of modern science

D. to use their ancestral knowledge and modern science

3. It can be concluded from the last paragraph that _____.[ ]

A. the first settlers in the Arctic survived by taking advantage of sea fish

B. it's hard to farm in the Arctic due to the climate change

C. the ancestors of Inuit people stood out among the settlers

D. the Thule people from Alaska invented iron tools

4. Which of the following is the best title of this passage?[ ]

A. Climate change and the Inuit

B. Climate change around the Arctic

C. Global warming around the world

D. The Inuit and their ancestors around the world

题型:单项选择题

对于复杂的计算机网络协议最好的组织方式是层次结构模型。我们将计算机网络层次结构模型和各层协议的集合定义为【 】。

题型:单项选择题

发动机的润滑方式有()。

A、飞溅润滑

B、压力润滑

C、复合润滑

D、注油润滑

E、自润滑

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