题目

  Is this the reason ______ at the meeting for his carelessness in his work?    A. What he explained                    B. how he explained    C. he explained                         D. why he explained 答案：C一只长方体油桶，底面是正方形，边长4cm，高6cm．如果每升汽油重0.82kg，这只油桶能装汽油多少千克？