The last full moon of 2017 is going to appear a little bigger and brighter than most.

    Dec. 3 will bring a supermoon,____ (mean) a full moon that happens at perigee—the same time that the moon is closest to the earth.____this particular occasion, the moon will appear 7 percent larger and 16 percent brighter than usual. Not only will this be the only full supermoon of 2017,____it's also going to kick off a series of three full supermoons in a row. The full moons on Jan. 2 and Jan. 31 will be super ____(one) and even they'll be blue super moons,____means the second full moon in a single month.

    While some moonwatchers might be getting excited, some people think the hype（炒作）around supermoons isn't all it ____ (regard) as being. A scientist slammed（抨击）the term last year as something made up ____ (complete) and a waste of everyone's time. He acknowledged that supermoons would appear bigger and brighter, but that actually an amateur ____ (observe) wouldn't notice the difference. Another scientist ____ (make) a similar ____ (argue) back in 2012.

    If the supermoon makes you want to go out and appreciate the sky's beauty, we say “Go for it.”

秦汉时期，我国的经济重心在北方。到了两宋时期，我国古代经济格局出现重大变化。阅读材料，回答问题。

材料一：

材料二：　“苏湖熟，天下足”“国家根本，仰给东南”

材料三：

材料四：两宋时期，中原军民英勇抗击契丹、女真等少数民族南侵，使南方地区长期处于相对和平的环境，南方经济迅速发展起来。北方战乱使中原人口南迁，给南方带来大量劳动力和先进的技术，推动南方经济进一步发展。南方地区大多日照充足，降水充沛，自然条件十分优越，为经济发展提供了有力的保证。……

──《两宋时期江南经济发展概况》

如图中的每一方格表示相关的一种反应物或生成物。其中B是一种单质，其余物质也都是有B元素的化合物。C是一种钠盐，E是C对应的酸，B的结构类似金刚石，D为B的氧化物（其他不含B元素的反应产物以及各步反应添加的必要试剂和反应条件已被略去），请填写空白：