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问题 单项选择题

一男性患者，呕吐吞酸。嗳气频繁，胸胁满痛，舌边红，苔薄腻，脉弦。治法宜用（）

A.消食化滞，和胃降逆

B.燥湿祛痰，健脾和胃

C.舒肝和胃降逆

D.温养脾胃，降逆止呕

E.以上都不是

答案

参考答案：C

单项选择题

Certificates are （71） documents attesting to the （72） of a public key to an individual or other entity. They allow verification of the claim that a given public key does in fact belong to a given individual. Certificates help prevent someone from using a phony key to （73） someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a Certificate also contains an （74） date, the name of the CA that issued the Certificate, a serial number, and perhaps other information. Most importantly, it contains the digital （75） of the certificate issuer. The most widely accepted format for certificates is X.509, thus, Certificates can be read or written by any application complying with X.509.

A．communication

B．computation

C．expectation

D．expiration
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填空题

树中度为零的结点称为______。
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