锅炉压力调节的理论依据是()。
A.质量守恒定律
B.能量守恒定律
C.质量守恒定律和能量守恒定律
D.质量守恒定律、能量守恒定律和质量与能量转换定律
参考答案:B
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.
73()
A.impersonate
B.personate
C.damage
D.control
站场分离器的排污为什么采用离线排污而不是在线排污?