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问题 单项选择题

A．having maintained good relations with other people

B．being patient enough

C．keeping secrets

D．being undetermined sometimes

答案

参考答案：D

单项选择题

一般蒸汽管道在适当的位置都应设置（），以便及时排出管道内的积水而且还能防止蒸汽的跑冒浪费。

A.排水阀门

B.疏水器

C.水封
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单项选择题

Network managers have long (140) practical voice-over-IP (VOIP) solutions. VOIP (141) ease network management and decreases costs by converging a company’s telephony and data infrastructures into one network. And a VOIP solution implemented at a company’s head-quarters with far-reaching branch offices can (142) tremendous amounts of (143) in long distance phone bills, provided that solution delivers POTS-like voice (144) over the Internet.

A．await

B．awaited

C．awaiting

D．awaits
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