题目

       Consumers are being confused and misled by the hodge-podge （大杂烩） of environmental claims made by household products, according to a “green labeling” study published by Consumers International Friday．        Among the report’s more outrageous （令人无法容忍的） findings, a German fertilizer described itself as “earthworm friendly”, a brand of flour said it was “non-polluting” and a British toilet paper claimed to be “environmentally friendlier”．        The study was written and researched by Britain’s National Consumer Council SDS—聚丙烯酰胺凝胶电泳中决定蛋白质或多肽移动速度的主要因素是(　　) A．蛋白质分子所带的电荷 B．蛋白质分子的形状 C．蛋白质分子的相对分子质量 D．缓冲溶液的pH