Fish ___ oxygen through their gills(鳃). III.单项填空: () 1. Air pollution can affect humans by___ sore eyes and respiratory problems, especially in children and___. A. cause, the old B. causing, the older C. causing, the elderly D. cause, the elderly ()...
这个句子的主语是water,谓语是will continue to be,表语是what it is today,补语是next in importance to oxygen.what 在句子中表示"什么的样子"就像She is no longer what she was ten years ago.她不再是十年前的样子了.as 不能引导表语从句.而how 是作状语,表示怎样.which指哪一个...
解析 C 关系代词what在这里引导一个名词性从句作to be的表语,同时what在表语从句中又为is的表语成分,这类语法结构还有,如:Show what you have written.(把你所写的给我们看看)和She is not what she was a few years ago.(她可不是几年前的她了)。其他选项均不能表示这种语法关系。
Oxygen moves down a partial pressure gradient from inspired gas, through alveolar gas, arterial blood, systemic capillaries and cells, to reach its lowest level within the mitochondria where it is consumed (Figure 1). The steps by which the Po 2 decreases from inspired gas to the mitochondria ...
解析 A核心短语/词汇:help sb./ sth. (to) do sth. 帮助某人/某物做某事句子译文:氧气是唯一的助燃气体吗? 本题考查定语从句。___helps fire burn 用来修饰之前的名词gas, 该从句的引导词在定语从句中做主语,不能省略,先行词有only 修饰时不能用which; what 不能引导定语从句,故选项A符合题意。反馈...
splitwaterintohydrogenandoxygen,withnootherby-products.Historically,electrolysis requiredsomuchelectricitythatitmadelittlesensetoproducehydrogenthatway.Thesituationis changingfortworeasons.First,significantamountsofexcessrenewableelectricityhavebecome availableatgrid(输电网)scale;ratherthanstoringexcesselectricityinarraysof...
下列有关物质的性质与应用不相对应的是 A．Na2O2能分别与H2O、CO2反应产生氧气，可用作供氧剂 B．硅胶多孔、吸水能力强，常用作袋装食品的干燥剂 C．K2FeO4具有强还原性且被氧化生成Fe3＋，可用于水的消毒和净水 D．液氨气化时能吸收大量的热，使周围温度急剧降低，因此可用作制冷剂 ...
百度试题 结果1 题目()10. Is oxygen the only gas helps fire burn? C. which D. what A. that B./ 相关知识点: 试题来源: 解析 A 反馈 收藏
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Plants release oxygen into the air. This is important for what? A. Keeping the air clean B. Making the air dirty C. Stopping animals from breathing D. Harming the E. nvironment 相关知识点: 试题来源: 解析 A。解析:植物释放氧气到空气中,这对于保持空气清洁很重要。选项 B 使空气变脏错误,...