试题来源: 解析 答案:D该题您未回答:х 该问题分值: 1答案:D本题考查的是动词辨析。hold持有,容纳;consisl:of由……构成;compose组成,常用作被动,be composed of由……构成;involve涉及,包括。本句的意思是:“化学的每个领域都涉及不同的化学反应。”故选D。
Every field of chemistry () different chemical reactions. A. holds B. consists C. composes D. involves 答案 D 本题考查的是动词辨析。hold持有,容纳;consisl:of由……构成;compose组成,常用作被动,be composed of由……构成;involve涉及,包括。本句的意思是:“化学的每个领域都涉及不同的化学反应。”故...
解析 解析:解析:本题考查的是动词辨析。题干大意:化学的每个领域都涉及不同的化学反应。hold意为“持有,容纳”;consist of意为“由…构成”;compose意为“组成”,常用作被动,固定搭配;be composed of意为“由…构成”;involve意为“涉及.包括”。故选D。
解析 D 句意:化学的每个领域都涉及不同的化学反应。本题考查的是动词辨析。hold意为“持有,容纳”;consist of意为“由……构成”;compose意为“组成”,常用作被动,be composed of意为“由……构成”;involve意为“涉及,包括”。结合句意,故选D。
rate of a chemical reaction without being consumed or changed significantly. Catalysts are not reactants or products, because they are not used up in the reaction. Catalysts are often used in industry to make reactions go faster (saves money and time). Catalyst in your body are called ...
Unexpectedly different reactions of [(arene)Mn(CO) 3 ] + cations (arene = trindane, indane, tetralin, or dibenzosuberane) with potassium t -butoxide - CH insertions, haptotropic shifts, dimerization, or eliminationarene-manganeseorganometallic cationsdeprotonations...
In conclusion, we have studied chemical reactions of the spatially separated ground states of para- and ortho-water with trapped diazenylium ions. We found a 23(9)% higher reactivity for the para nuclear-spin isomer which we attribute to the smaller degree of rotational averaging of the ion-...
Crystals of three new ternary pnictides-Ba7Al4Sb9, Ba7Ga4P9, and Ba7Ga4As9 have been prepared by reactions of the respective elements in molten Al or Pb fl... SBS He - 《Journal of Solid State Chemistry》 被引量: 0发表: 2016年 Concerning the Different Roles of Cations in Metallic...
The reactions of different food classes during alkaline subcritical water gasification have been investigated with a view on hydrogen gas production. Experiments were conducted with sub-stoichiometric amounts of H2O2 for partial oxidation. NaOH was added to aid sample decomposition, reduce char/tar forma...
(OH)2formed by other reactions. I don't know what the blue fluff you've found is, but when I used to do precip. reaction with my chemistry set as a kid, I'd often get a fluffy precipitate that changed colors as it aged. Maybe some older chemistry texts have an explanation for ...