[E]OG-40，请指点！

excellent

40. In metalwork one advantage of adhesive-bonding over spot-welding is that the contact, and hence the bonding, is effected continuously over a broad surface instead of a series of regularly spaced points with no bonding in between.
A.instead of
B.as opposed to
C.in contrast with
D.rather than at
E.as against being at

答案没有问题。可我不太清楚instead of和rather than的区别？有的书上说后者好于前者，它们在用法上有何不同？如果选项A、B、C后各加上一个at，它们是否正确？

halcyon

介词后面好像只能加名词吧， instead of at, 好像不行。

halcyon

说错了，介词后面可以加介词， instead of at 应该是对的