在太阳光球层和色球层分别出现的太阳活动主要和明显的标志是:()。
A. 黑子和光斑
B. 耀班和日珥
C. 黑子和日珥
D. 耀斑和黑子
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下列选项中常用做无机化学发泡剂的是_______。
A. 碳酸盐
B. 亚硝酸盐
C. 氢硼化钾与氢硼化钠
D. 过氧化氢
The Chinese brand value now accounts for 11 percent of the total reaching $937 billion.()
The very idea of Marketing Warfare is to treat marketing campaign as a battle and a competitive edge.()
Word-of-mouth marketing (WOM marketing) is free advertising triggered by customer experiences.()