技术人员A说，节流压力必须克服调速器压力之后变速器才能降档。

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问题单项选择题

技术人员B说，当调速器压力克服了节流压力且换档阀移动时，发生升档。

谁正确？（）。

A、只有技术人员A

B、只有技术人员B

C、技术人员A和B都正确

D、技术人员A和B都不正确

答案

参考答案：C

单项选择题

Certificates are (16) documents attesting to the (17) 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 (18) someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a certificate also contains an (19) date, the name of the CA that issued the certificate, a serial number, and perhaps other information. Most importantly, it contains the digital (20) 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．connecting

B．binding

C．composing

D．conducting

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单项选择题

与十进制数245等值的二进制数是______。

A) 11111110
B) 11101111
C) 11111011
D) 11101110

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