题干
How to computers us better is an important task.
A：make; to serve
B：make; serve
C：making; serving
D：made; serving
答案(点此获取答案解析）
B
How to computers us better is an important task.
A：make; to serve
B：make; serve
C：making; serving
D：made; serving
或
行驶，在全程中，甲的时间速度关系如图甲，乙的路程速度关系如图乙，那么下列说法正确的是
