Not only does it make expensive road systems unnecessary, but it enables vehicles to travel equally well over land and water.

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问题 Not only does it make expensive road systems unnecessary, but it enables vehicles to travel equally well over land and water.

选项 A、它不仅使昂贵的道路系统成为多余,而且使车辆能在陆地或水面上行驶同样好。
B、它虽然使昂贵的道路系统成为多余,但是能使车辆在陆地或水面上行驶同样好。
C、它不能使昂贵的道路系统成为多余,而且使车辆能在陆地比水面上行驶好。
D、它不能使昂贵的道路系统成为必要,却使车辆能在陆地或水面上行驶同样好。

答案A

解析
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