题目

He was obviously annoyed，for he was not used to ________ like that. A.speaking             B.spoken to   C.being spoken      D.being spoken to 答案：D金属铝比金属铁价格高，你认为主要因素是 [　　] A．铝比铁密度小 B．铝比铁耐腐蚀性能好 C．自然界中含量铝比铁少 D．铝的冶炼成本较高