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【单选题】
某镀液镀出产品一直有针孔，加入一定量某添加剂后，这种现象消除了，电镀工艺中称此添加剂为（）。
A.
润湿剂
B.
光亮剂
C.
去应力剂
D.
稳定剂
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】[2012·广元三模]一定条件下，用甲烷可以消除氮的氧化物(NOx)的污染，已知：①CH4(g)＋4NO2(g) ＝4NO(g)＋CO2(g)＋2H2O(g) ΔH1＝－574kJ·mol-1②CH4(g)＋4NO(g) ＝2N2(g)＋CO2(g)＋2H2O(g)ΔH2＝－1160kJ·mol-1下列选项正确的是（）
A.
CH4(g)＋2NO2(g) ＝N2(g)＋CO2(g)＋2H2O(g)ΔH＝－867kJ·mol-1
B.
CH4(g)＋4NO2(g) ＝4NO(g)＋CO2(g)＋2H2O(l)ΔH3＞ΔH1
C.
若用0.2mol CH4还原NO2至N2，则反应中放出的热量一定为173.4kJ
D.
若用标准状况下2.24L CH4还原NO2至N2，整个过程中转移的电子为1.6mol
【单选题】Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food．Fergus Clydesdale, head of the department of food science and nutrition at the University of Massac...
A.
They overlook the risks of the food they eat.
B.
They overestimate the hazards of their food.
C.
They are overoptimistic about the safety of their food.
D.
They overstate the government's interference with the food industry.