决策的优化有赖于()的优化。A.决策系统 B.决策结构 C.决策层次 D.决策组织体

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问题:

决策的优化有赖于()的优化。

A.决策系统

B.决策结构

C.决策层次

D.决策组织体制和程序

考点:城市规划师城市规划管理与法规城市规划管理与法则5
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电子文件按生成方式可分为:()和将纸质或其他载体文件重新录入生成的数字化电子文件。

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典型的食管癌症状是()。

A.进行性吞咽困难

B.进餐后上腹痛,至下一餐前缓解

C.不洁饮食后上腹痛,伴呕吐、腹泻

D.空腹及夜间上腹痛,进食后可缓解

E.反酸、烧心伴胸骨后烧灼样痛

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.电影《公民凯恩》的导演是()。

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Electronic mail has become an extremely important and popular means of communication.
The convenience and efficiency of electronic mail are threatened by the extremely rapid growth in the volume of unsolicited commercial electronic mail. Unsolicited commercial electronic mail is currently estimated to account for over half of all electronic mail traffic, up from an estimated 7 percent in 2001, and the volume continues to rise. Most of these messages are fraudulent or deceptive in one or more respects.
The receipt of unsolicited commercial electronic mail may result in costs to recipients who cannot refuse to accept such mail and who incur costs for the storage of such mail, or for the time spent accessing, reviewing, and discarding such mail, or for both. The receipt of a large number of unwanted messages also decreases the convenience of electronic mail and creates a risk that wanted electronic mail messages, both commercial and noncommercial, will be lost, overlooked, or discarded amidst the larger volume of unwanted messages, thus reducing the reliability and usefulness of electronic mail to the recipient. Some commercial electronic mail contains material that many recipients may consider vulgar or pornographic in nature.
The growth in unsolicited commercial electronic mail imposes significant monetary costs on providers of Internet access services, businesses, and educational and nonprofit institutions that carry and receive such mail, as there is a finite volume of mail that such providers, businesses, and institutions can handle without further investment in infrastructure. Many senders of unsolicited commercial electronic mail purposefully disguise the source of such mail.
Many senders of unsolicited commercial electronic mail purposefully include misleading information in the messages’ subject lines in order to induce the recipients to view the messages. While some senders of commercial electronic mail messages provide simple and reliable ways for recipients to reject (or ’opt-out’ o0 receipt of commercial electronic mail from such senders in the future, other senders provide no such ’opt-out’ mechanism, or refuse to honor the requests of recipients not to receive electronic mail from such senders in the future, or both.
Many senders of bulk unsolicited commercial electronic mail use computer programs to gather large numbers of electronic mail addresses on an automated basis from Internet websites or online services where users must post their addresses in order to make full use of the website or service.
The problems associated with the rapid growth and abuse of unsolicited commercial electronic mail cannot be solved by the government alone. The development and adoption of technological approaches and the pursuit of cooperative efforts with other countries will be necessary as well.

What does unwanted e-mail messages do to the providers of the Internet services

A.Raising their cost.

B.Raising the Internet speed.

C.Improving their business.

D.Attracting investment.

题型:单项选择题

盘口穿带壶

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