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问题 单项选择题

男性，28岁。左上后牙自发性、持续性跳痛3d。患牙不敢对。口腔检查：叩诊，松动Ⅰ度，牙周检查（-）。温度刺激试验无反应。左侧颌下淋巴结肿大。可诊断为（）。

A．急性浆液性根尖周炎

B．急性浆液性牙髓炎

C．急性化脓性根尖周炎

D．急性化脓性牙髓炎

E．急性牙周膜炎

答案

参考答案：C

单项选择题

For each blank, choose the best answer from the four choices and write down on the answer sheet.
(11) is a protocol that a host uses to inform a router when it joins Or leaves an Internet multicast group.
(12) is an error detection code that most data communication networks use.
(13) is an interior gateway protocol that uses a distance vector algorithm to propagate routing information.
(14) is a transfer mode in which all types of information are organized into fixed form cells on an asynchronous or non-periodic basis over a range of media.
(15) is an identifier of a web page.

A．ICMP

B．SMTP

C．IGMP

D．ARP
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多项选择题

网上支付系统涉及（），网上支付系统把银行的柜台延伸到客户端，因此，网上支付是传统支付系统的创新和发展。

A.付款人

B.收款人

C.银行

D.商品
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