- **A. 附近有水泵**:水泵若仅抽取水而不产生明显的水流喷溅或雾化,对负离子的生成作用有限。- **B. 缓慢流动的河流旁**:缓慢水流对水分子的撞击力较弱,负离子生成效率较低,浓度相对不高。- **C. 高而荒芜的山顶**:虽可能因空气稀薄、电离作用存在负离子,但缺乏植被和水源,实际浓度通常较低。- *...
4A high negative ion count is likely to be found ___. A.near a pond with a water pumpB.close to a slow-flowing riverC.high in some barren mountainsD.by a rotation water sprinkler 5A high negative ion count is likely to be found A.near a pound with a water pumpB.close to ...
Answer The correct answer is:D) Anion Explanation An ion with a net negative charge is referred to as an "anion." Anions are generated when an atom obtains one or more electrons, resulting in an excess of negatively charged electrons in the nucleus relative to protons that are charged positi...
Conversely, when large numbers of negative ions are present, then people have a feeling of well-being. Natural conditions that produce these large amounts are near the sea, close to waterfalls or fountains, or in any place where water is sprayed, or forms a spray. This probably accounts for...
国网电力英语试题及答案.doc,国网电力英语试题及答案 一、单选题 1.Theres something wrong with the thermometer.Dont worry.IlI make it( ) A. to work B. working C. work(正确答案) D. works 2.Although the family trusted her, she( )them down badly. A. put B. set
A. near a pond with a water pump. B. close to a slow-flowing river. C. high in some barren mountains. D. by a rotating water sprinkler. 相关知识点: 试题来源: 解析 D 正确答案:D 解析:第三段第二句话指出,产生大量负离子的自然条件是靠近大海、瀑布或喷泉的地方,或任何有喷水或形成水花的...
A high negative ion count is likely to be found ___. A.near a pond with a water pumpB.close to a slow-flowing riverC.high in some barren mountainsD.by a rotating water sprinkler 相关知识点: 试题来源: 解析 C [解析] 这道题所参照的文中关键词是spray,可由此进行引申。反馈 ...
3e). Such a pattern is indicated by experimental data for food-restricted cohorts of house crickets, which also display a negative correlation between age and size at maturation (Fig. 3b). There is strong empirical support for this to be a common pattern among insects and other organisms44,...
Plants usually produce defence metabolites in non-active forms to minimize the risk of harm to themselves and spatiotemporally activate these defence metabolites upon pathogen attack. This so-called two-component system plays a decisive role in the chemi
et al. Chaperone-mediated autophagy regulates T cell responses through targeted degradation of negative regulators of T cell activation. Nat. Immunol. 15, 1046–1054 (2014). This article is the first demonstration that CMA plays an important role in T cell immune regulation in vivo. Article CAS...