抢救急性CO中毒时防治脑水肿的措施是（）

A.吸氧、高压氧舱疗法

B.快速静注甘露醇、呋塞米、糖皮质激素等

C.使用能量合剂和甲氯芬酯（氯酯醒），胞磷胆碱等

D.注意口腔卫生、使用抗生素等

E.立即将患者转移到空气新鲜的地方

Certificates are （） documents attesting to the （） 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 （） someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a Certificate also contains an （） date, the name of the CA that issued the Certificate, a serial number, and perhaps other information. Most importantly, it contains the digital （） 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.

As commonly used, a Certificate also contains an （） date, the name of the CA that issued the Certificate, a serial number, and perhaps other information.

A．communication

B．computation

C．expectation

D．expiration