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