The research and development in information and data retrieval is aimed(31)improving the and efficiency of retrieval. Individual and parallel development (32)database management systems left this sector (33)a centralized vision and coordination (34) the different types of search engines. Search engine(35) the Internet are very specific and not able to cope with multiple database formats and file types.

将网上内容进行手工分类耗时太多，得到的搜索结果却不多。(result in)

企业会利用其商业计划书来寻求资金。(funding)

在显著的位置把所有销售和售后服务条款都写清楚。(dearly and prominently)

商业计划书的一个目的就是确定商机的市场可行性。(feasibility)

有必要按照重要性来排列信息。(rank…by)

(71)[To some extent, the online and offline worlds may merge.] Multi-channel selling could involve a combination of traditional shops, a printed catalogue, a home-shopping channel on TV, a phone-in order service and an e-commerce-enabled website. (72)[But often it is likely to be the website where customers will be encouraged to place their orders.]

(73) [One of the biggest commercial advantages of the internet is a lowering of transaction costs, which usually translates directly into lower prices for the consumer.] So, if the lowest prices can be found on the internet and people like the service they get t why would they buy anywhere else?

One reason may be convenience; another concern about fraud, which poses the biggest threat to online trade. (74) [But as long as the internet continues to deliver price and product information quickly, cheaply and securely, e-commerce will continue to grow.] Increasingly, companies will have to assume that customers will know exactly where to look for the best buy. (75) [This market has the potential to became as perfect as it gets.]

The firm is now showing a sign of return to_______. (profitable)

Heavy fighting has been going on after the guerrillas (游击队)had______ (launch) their offensive.

Do you have a_______( prefer) for sweet or spicy food?

Minerals can be absorbed and_____(utilize) by the body in a variety of different forms.