40. In metalwork one advantage of adhesive-bonding over spot-welding is that the contact, and hence the bond-ing, 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

1 比较结构（并列） ：(一级排除A,B,C )
must describe the effects in parallel terms
介宾结构的比较： 前后要补出介词。判断依据是前面的介词是否可以用在后面的名词上。 at the point 不能用 over the point
over a broad surface rather than at a series

2. 简洁(二级排除E )
, as against being is a wordy and unidiomatic way to establish the intended contrast.

3. 词法：
注意介词at的用法，点用at.
rather than 和 instead of的区别