题目内容
（请给出正确答案）
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“The federal government of the United States is comprised of three branches—the legisla”相关的问题
A、Vibration monitoring
B、Monitoring of insulation performance
C、Temperature monitoring
D、Humidity monitoring
A、Their grades can plunge.
B、Their health decline.
C、Their friendship cease.
D、They can win a scholarship.
A、2, 2
B、2, 4
C、4, 2
D、4, 4
A、(i) and (ii) only
B、(i) and (iii) only
C、(ii) and (iii) only
D、(i), (ii) and (iii)
Read the following five sentences and match each sentence with one of the extracts below. The five extracts are from a passage about services and e-commerce. ( ) 1 Early attempts at trading services electronically failed. ( ) 2 Companies are sometimes graded on the service they have provided. ( ) 3 It is easy to find service providers through e-commerce. ( ) 4 Customers do not always expect to pay for online services. ( ) 5 Services as well as goods can be bought online. A. E-commerce used to be just about buying products. But now firms everywhere have launched electronic marketplaces for services of all sorts―from gardening advice to financial planning. If services now exist in the online world, those markets will become more competitive―as they have for computers and other items sold over the Internet. B. In the 1980s, the late Phil Salin dreamed up the American Information Exchange, a marketplace for research, consulting, and computer code. But it never really became successful, largely because it came before the Internet: Much of the cash and effort went into trying to create a network. C . Advoco, one of the few service markets that is already online, employs experts who want to give advice. Users then choose one of the “advisers” directly or post a question on a bulletin board that others can answer with a bid. Once the service is delivered and paid for, users rate the sellers on a scale from one (lowest) to five (highest) and post comments about them. D. Supply of labor is not likely to be a problem for service sites. Some companies already have hundreds of professionals, attracted by word of mouth alone. Joining is free―and more promising than an expensive ad. What is more, for professionals living in developing countries, these online forums offer a unique opportunity to enter richer service markets. E. Whether there is enough demand for service sites is questionable. Small businesses and independent professionals, always short of time, might be interested. But to be widely successful, Internet service markets have to overcome cultural barriers. Individuals are used to getting advice free over the Internet and will hesitate to employ a service provider whom they have never met face to face.
警告：系统检测到您的账号存在安全风险
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
