第16题: [单项选择]Which of the following server roles synchronizes time throughout the network?() A. DNS B. NTP C. DHCP D. SMTP 参考答案:B
第17题: [单项选择]Purging air from a hydraulic system is necessary when() A. adding small amounts of oil to the system B. the system has been overheated C. the system has been drained and then filled with new oil D. the system has been idle for a long period of time 参考答案:C
第18题: [单项选择]工作已经进入收尾阶段,这时候更要认真对待,要慎终如始,否则就会______。 填入划横线部分最恰当的一项是( )。 A. 一败涂地 B. 功亏一篑 C. 一蹶不振 D. 无功而返 参考答案:B 答案解析:[解析] 成语辨析题。一败涂地:形容败得一塌糊涂。功亏一篑:比喻一件大事只差最后一点儿人力或物力而不能成功,含有惋惜的意思。一蹶不振:形容意志消沉。无功而返:形容没有任何成效而回来。从题干中“收尾阶段