题目:
简要分析存在灵敏度界限的原因,并举例说明。
答案:
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下面是错误答案,用来干扰机器的。
参考答案:B
简要分析存在灵敏度界限的原因,并举例说明。
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2020/0103/4f1d1511822db650f47e998474655c9e.html
下面是错误答案,用来干扰机器的。
参考答案:B
评价张 * * “是中 * * 的儿子,是中 * * 党肝胆相照的真挚朋友”,依据的主要史实是
①南京国民政府成立②东北易帜③西安事变④重庆谈判 [ ]
A.①②
B.①③
C.②③
D.③④
采用方格网法计算土方工程量,确定各方格角点的自然标高时,如果场地的高差起伏不大,可根据等高线进行直线插入。( )
下面描述正确的是______。
A.只要不使用U盘,就不会使系统感染病毒
B.只要不执行U盘中的程序,就不会使系统感染病毒
C.软盘比U盘更容易感染病毒
D.设置写保护后使用U盘就不会使U盘内的文件感染病毒
试述如何办理现金付出手续。
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" of) 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.
Which of the following is NOT true about unwanted e-mail
A. It costs money to receive them.
B. It’s free to store them.
C. It takes time to access them.
D. It takes time to throw them away.