题目

Is this the reason ________ at the meeting for his carelessness in his work? A . he explained B . what he explained C . how he explained D . why he explained. 答案：A大型平板载重汽车装有很多的轮子，这样做的目的是为了：A. 减小对地面的压力；　　　　　　　　　　B. 增大对地面的压力； C. 减小对地面的压强；　　　　　　　　　D. 增加对地面的压强.