题目

—Could you buy me a MP3 like this, Uncle? —Sure. I will buy you _____ one than this, but _____ this. A. a cheaper, as nice as       B. a better, better than  C. a worse, as nice as        D. a dearer, worse than 答案：A已知河水的流速为v1，小船在静水中的速度为v2，且v2＞v1，下面用小箭头表示小船及船头的指向，则能正确反映小船在最短时间内渡河、最短位移渡河的情景图示依次是（　　）A．①②B．①⑤C．④⑤D．②③