题目

关于我国人口分布的叙述，正确的是(     ) A．我国人口占世界的0.3% B．我国人口西北多、东南少 C．我国农村人口多于城镇人口 D．我国人口分界线是黑河﹣腾冲线 答案：D．Most green vegetables, such as spinach cabbage,____ for too long, will lose nutrition. A．if to be cooked           B．if cooking            C．if cooked            D．if being cooked