题目

下列关于实验现象的描述，错误的是 A、铁在氧气中燃烧，火星四射，生成黑色固体 B、磷在氧气中燃烧，产生大量白雾 C、硫在氧气中燃烧，火焰呈明亮的蓝紫色，生成有刺激性气味的气体 D、木炭在氧气中燃烧时，有能使澄清石灰水变浑浊的气体生成 答案：B Accustomed to ________ the steep mountains, she had no difficulty ________ the top． [　　] A． climbing; to get to B． climb; arriving C． climb; to arrive at D． climbing; reaching