发动机按使用燃料分为()发动机。A.汽油 B.风冷式 C.水冷式 D.柴油

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问题:

发动机按使用燃料分为()发动机。

A.汽油

B.风冷式

C.水冷式

D.柴油

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中国历史上第一个统一的多民族的封建国家建立于 [ ]

A、公元前2070年

B、公元前221

C、公元前138

D、220年

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According to traditional Cherokee beliefs, we are part of (1) . We don’t (2) with it and we’re not trying to (3) it. We are a part of the Great Life. And within the Great Life, there are three great Laws of Nature, which tell us how we have to live in (4) with everything else. The First Law of Nature is that you don’t take any life without real (5) . So we shouldn’t (6) needlessly. We believe everything is alive, including animals, plants and (7) . And so to us, taking the life of a plant is just as grave a 8() as taking the life of an animal. The Second Law is that everything we do should (9) the Great Life. And everything we do (10) the Great Life, and everything that (11) within the Great Life affects us. So it’s very important that what we do will not (12) other parts of the Great Life. The Third Law basically is that we don’t (13) where we live. And where we live is not our (14) , small community. It’s this (15) . We don’t pour chemical (16) down the drain because they all wind up in the water. It might seem a little difficult to live by those three laws in this (17) society. But there are still a lot of things that we can do to bring these laws into our lives, such as (18) , using the (19) as little as possible, and (20) gardening.

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蔓状血管瘤主要由()

A.厚壁动脉构成

B.厚壁静脉构成

C.动脉和静脉共同组成

D.静脉和毛细血管共同组成

E.网状毛细血管构成

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有限服务饭店在客源市场方面,消费群体的主体是市场规模大,客源稳定的一类旅游者,这类旅游者较为敏感的是()。

A.价格

B.产品

C.质量

D.服务

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胶质层煤样的制备,煤样的缩制和留样量,从粒度小于3mm的煤样中缩分出不少于0.75kg(单次测定用量为100g)煤样。

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