题目:
The manager says that the project is progressing smoothly,and that all construction work________by
the end of next month. [ ]
A. has been completed
B. has completed
C. will have been completed
D. will have completed
答案:
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参考答案:B解析:涉及是网络的相关知识,参考译文如下。 网络可以用不同的设备互联,在物理层用中继器或集线器互联,这些设备只是在相同的网络之间传送比特串;在上面的数据链路层可以使用网桥或交换机,这些...