搜题请搜索小程序“爱下问搜题”
问题 选择题

Ms Brown is        English. She is        old teacher.

A．a, a                 B．×, an               C．an, an

答案

答案：C

题目分析：句意：布朗夫人是一个英国人。她是一个老教师。English的第一个音素是【i】，是元音所以用an，old的第一个音素是【əu】，因为是元音，所以用an。故选C.

单项选择题

To compete in today’s fast-paced competitive environment, organizations are increasingly allowing contractors, partners, visitors and guests to access their internal enterprise network. These users may connect to the network through wired ports in conference rooms or offices, or via wireless access points. In allowing this open access for third parties, LANs become (1). Third parties can introduce risk in a variety of ways from connecting with an infected laptop to unauthorized access of network resources to (2) activity. For many organizations, however, the operational complexity and costs to ensure safe third party network access has been prohibitive. Fifty-two percent of surveyed CISOs stated that they currently use a moat and castle" security approach, and admit that defenses inside the perimeter are weak. Threats from internal users are also increasingly a cause for security concerns. Employees with malicious intent can launch (3) of service attacks or steal (4) information by snooping the network. As they access the corporate network, mobile and remote users inadvertently can infect the network with (5) and worms acquired from unprotected public networks. Hackers masquerading as internal users can take advantage of weak internal security to gain access to confidential information.

4（）

A．reserve

B．confidential

C．complete

D．mystery
查看答案
单项选择题

下列关于燃气管道补偿器安装的说法，错误的是（）。

A.安装在阀门的下侧

B.安装在架空管道上

C.应便于阀门的拆卸和检修

D.填料补偿器支座导向应防止运行时自由伸缩
查看答案