题目

One＿＿＿ five will have the chance to join in thegame.A. within     B. among     C. in     D. from 答案：C 解析: “one in five”指“五人中有一个”，即“one out of five”。图中哪种情况下两灯组成并联电路？A.S1断开、S2闭合、S3断开B.S1闭合、S2断开、S3闭合C.S1断开、S2闭合、S3闭合D.S1、S2、S3都闭合