题目

Maggie wanted an evening job that would allow her to ______ her son during the day. A. look at             B. look around                   C. look after          D. look out 答案：C在①平行四边形；②矩形；③菱形；④正方形；⑤等腰梯形这五种图形中，既是轴对称图形又是中心对称图形的是_____（只填序号）．