在风力较小、逆温、相对湿度较低的情况下,随着悬浮颗粒物的增多而导致大气能见度小于10千米的现象叫霾。如图为北京、天津、河北三省市各月霾日数变化图。读图,回答下列问题。
— What's ____ hobby?
— My father likes reading.
读亚洲局部地区图(图1)和某国原材料总量与进口总量统计图(图2),结合所学知识,回答下列问题.
All the students p____ at the lecture were deeply touched by his success story.
含有成分
钙
镁
钾
钠
其它
含量(mg/L)
≥4.0
≥0.5
≥0.35
≥0.8
略
该表中的“钙、镁、钾、钠”应理解为( )