大全 392

392.       
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（D）

(E) as against
being at

答案D。A为何错？

宾语从句： contact ... is effected over surface (instead of) a series of points, 此处surface和points并列，为何D中有at？