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【单选题】
关于DNS系统,不正确的是_______?A.
域名系统是一个层次式结构
B.
DNS系统能够将域名转换为IP地址
C.
域名系统有一个集中式数据库，存储着所有的域名与IP地址的对应关系，并负责Internet上所有的域名解析任务
D.
域名的管理、注册等由专门机构负责，如IAAAC、CNNIC等
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【单选题】Everyone in our class . [ ]
A.
enjoys to swim
B.
enjoy to swim
C.
enjoys swimming
D.
enjoy
【简答题】6 在 RLC 串联正弦稳态电路中,已知端口总电压为 ,电感电压为 60V ,则电阻电压为 ________V ,电容电压为 _______V 。
【判断题】在训练开始时有些学生抱怨自己似乎理解了原语,但是等到翻译时却记不起刚才听过的内容。这其中的原因主要有:注意力不够集中、对话题不熟悉、英汉语序差异大、外语水平不够等。
A.
正确
B.
错误
【单选题】Before my speech I've _____ a state of calmness and confidence.
A.
maintained
B.
contained
C.
sustained
D.
attained
【单选题】—How about your English speech contest yesterday? —Quite well.But my heart was in my mouth before it.
A.
I felt very happy.
B.
I felt very nervous
C.
I felt very easy
D.
I felt very cold
【单选题】The speech by the mayor of Shanghai before the final EXPO 2010 is strongly impressed ____ my memory.
A.
to
B.
over
C.
by
D.
on
【单选题】U13t2 How often does the United States government conduct a census?
A.
Every twelve years
B.
Once a year
C.
Every ten years
【单选题】Everyone in our class _____. [ ]
A.
enjoys to swim
B.
enjoy to swim
C.
enjoys swirnmmg
D.
enjoy swimming
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