问题 单项选择题 案例分析题

患者为28岁女性,因"日晒后面部红斑半年"而就诊。体检可见前发际头发稀疏,面部有不规则圆形红斑,边缘略高出皮面,口腔黏膜有多个浅表溃疡,肝脾轻度肿大。根据患者临床表现及实验室检查,该患者符合美国风湿病学会修订的SLE诊断标准。

关于本例实验室检查下列哪项说法是错误的()

A.多数SLE患者的抗核抗体为阳性

B.抗Sm抗体为SLE标记抗体

C.低补体血症常表明SLE处于活动期

D.狼疮细胞阳性仅见于SLE患者一

E.皮肤狼疮带试验有假阳性也有假阴性

F.部分患者可以出现梅毒血清试验阳性

答案

参考答案:D

选择题
单项选择题

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.

It can be inferred from Paragraph 6 that bulk unsolicited commercial e-mail will probably spread ().

A. harmful virus

B. unpleasant news

C. advertisements

D. adult jokes