第24题: [单项选择]Earl was balancing himself on top of the fence when he lost his ______ and fell off. A. equilibrium B. equivalence C. equivalent D. equation 参考答案:A 答案解析:[解析] 本题空格处是说他失去平衡跌落下来。A项equilibrium“平衡,平静,均衡”符合题意,如:the equilibrium of demand and supply(供求均衡)。其他三项e