the young elephants each ——as——as 200kilograms,and the old o
the young elephants each ——as——as 200kilograms,and the old one is three times as—— A weighs;much'heacy B is weighed;many;heavy C are weighed;many;much D weigh;much;heavy 只知道答案是D,但是为什么选D呢~请老师们帮忙解答~