题目

Michael Jordan has failed over and over again in his life, but he has never given up. And that's _________ he succeeds． A. what     B．when       C．why        D．where 答案：C元素周期表是一座开放的“元素大厦”，元素大厦尚未客满。若发现117号元素，请您在元素大厦中安排好它的“房间”A.第七周期第0族B.第六周期ⅡA族C.第八周期第ⅠA族D.第七周期第ⅦA族