( 2018 湖北襄阳) 甲、个完全相同的密闭圆台形容器,一正一反放置在同水平桌面上,装有质量相等、深度相同的不同液体,如图所示。桌面受到甲、容器的压力分别为 F 甲 和 F 乙 ,两容器底部受到液体的压强分别为 p 1 和 p 2 ,则 F 甲 F 乙 , p 1 p 2 (填 “ 大于 ” 、 “ 小于 ” 或 “ 等于 ” )。
【单选题】In a closed economy a rise in aggregate demand is needed to increase output in the country. What is necessary to achieve this increase in output in the economy?
A.
enough capacity to produce the extra goods and services demanded
B.
free trade to allow imports to make up any shortages in supply