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提问人:网友gddtan 发布时间:2022-01-07
[主观题]

It has __10____in every aspect of the chemical industry–including catalysis, materials science, pigments, surfactants, coatings, medicine, fuel, and agriculture.

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Dust collection systems are most widely used engineering control technique.
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第2题
The committee was satisfied that minor incidents of misconduct or ________ of the chairman had been well handled by the directors within the rules.

A、contention

B、defiance

C、prediction

D、illusion

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第3题
5.The ions are described by their_11____ state and their__12_____ of formation can be inferred from the ionization potential (for cations) or from the__13____ (anions) of the parent elements.
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第4题

AbstractThe continuous emergence of drug-resistant bacteria has become a severe threat to the public health. Therefore, the discovery of novel antibacterial mechanisms to combat this jeopardized problem is urgently needed. In the past decades, plenty of new antibacterial modes of action have been discovered continuously, based on which many promising scaffolds have been designed and synthesized. In particular, cationic amphiphilic small-molecules open a door to the new mode of action of bactericidal agents by depolarizing and disturbing the bacteria membrane. The cationic amphiphilic are characterized by high efficacy, resistant-proof, wide-spectrum, and high selectivity toward bacteria. In this review, we summarized recent advances in the discovery of membrane-active small-molecules and their structure-activity relationships (SARs), hoping to provide an evidence for future research and development of new antibacterial agents with new mechanism.

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第5题
An atom is the smallest__1__ of a chemical element.
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第6题
Atoms are composed of subatomic particles, including protons,__2__ , and electrons.
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第7题
Dalton recognized that the structure of atoms in a particular element or compound is__4_.
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第8题
Amedeo Avogadro (1776-1856), an Italian physicist, was the first scientist to__5_ the distinction between atoms and molecules.
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第9题
化学工业对粮食生产和人类健康所做的贡献是巨大的.一方面,它提供大量的肥料为农作物补充营养;生产杀虫剂等农药减少害虫对农作物的危害;生产兽药保护家禽免受疾病的侵害。另一方面,化学制药为我们的身体健康提供了保障。例如,用抗生素治疗细菌感染,用B-抗血栓降低血压。
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