(21) buying and selling products, e-business may also(22) other traditional business aspects. The use of electronic chat as a form of technical and customer support is an excellent (23) of this. An e-business which uses chat to supplement (补充) its traditional phone support finds a system which (24) incredible amounts of time while providing opportunities (25) through traditional support. By using (26) computer systems, for example, technical support operators can remotely (27) a customer's computer and (28) them in correcting a (29) . And with the download of a small program, all pertinent information about the hardware and software specifications for a user's computer may be relayed to the support operator directly, without having to walk a customer through personally (30) the data.
21.
A.Beside B.In addtion C.In addtion to D.As well正确答案C