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动脉导管一般在一岁内因废用而闭塞,如一岁半后仍未闭塞,即为动脉导管未闭

A. 正确
B. 错误

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You are employed as the enterprise exchange administrator at TestKing.com. TestKing.com makes use of Microsoft Exchange Server messaging solution. You are responsible for managing the Exchange Server2010 organization. TestKing.com makes use of an Edge Transport server to send and receive e-mail messages. You discover that a number of servers on the Internet classify e-mail messages from your organization asspam. You receive an instruction from management to reduce the likelihood of e-mails sent by theorganization to be classified as spam. What should you do?()

A. You should consider installing a server certificte from a trusted third-party certification authority (CA).
B. You should consider implementing Microsoft Forefront Security for Exchange Server.
C. You should consider creating SenderID TXT records for the Edge Transport servers.
D. You should consider configuring the Edge Trasport servers to make use of real-time block list (RBL).

无线局域网的基础还是传统的有线局域网,是有线局域网的扩展和替换。它是在有线局域网的基础上通过无线Hub、无线接入点、无线网桥及无线网卡等设备使无线通信得以实现。

A. 正确
B. 错误

为实现邻里互助和环境保护目标,社会工作者在某社区倡导开展了“骑车出游”的活动。活动开展半年后,小区居民都切身感受到邻里关系的融洽,互助精神蔚然成风。这反映出()。

A. 生理因素影响人的成长
B. 社会因素影响人的成长
C. 人类行为影响社会环境
D. 心理因素影响社会环境

出租汽车驾驶员是出租出租汽车行业的()从业人员。

A. 少数
B. 主体
C. 全部

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