搜题请搜索小程序“爱下问搜题”
问题 单项选择题

衡量润滑油的主要质量指标有（）。

A．粘度、润滑性（油性）、极压性

B．闪点、凝点、氧化稳定性

C．粘度、润滑性（油性）、极压性、闪点、凝点、氧化稳定性

答案

参考答案：C

单项选择题

(21) put computers to practical business use, but below the surface it is the heart of an (22) - the kernel - that provides the technical wizardry to juggle multiple programs, connect to networks and store (23) .
A traditional kernel provides all the functions for applications. The kernel (24) memory, I/O devices and parcels out processor time.
The kernel also supports (25) and fault tolerance, which is the ability to recover automatically when parts of the system fail.

A．authentication

B．auto - correction

C．security

D．problem
查看答案
选择题

They were thirsty, so they went ______ something to drink.

A．searching for

B．searching for

C．searching

D．in their search of
查看答案