题目

检查视力的时候,视力表放在被测者头部的后上方,被测者识别对面墙上镜子里的像 (如图所示)。视力表在镜中的像与被测者相距(  ) A.2.0 m    B.0.5m   C.4.5m    D.5m 答案:CWalk ______ the river, then go ______ the trees, you can see a new zoo.A.cross, pass B.across, through C.across, over D.cross, through
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