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【多选题】
根据经济周期经历的时间长短不同,可以把经济周期划分为()A.
短周期
B.
中周期
C.
中长周期
D.
长周期
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【单选题】关于Intemet域名系统的描述中，错误的是（ ）。
A.
域名解析需要一组既独立又协作的域名服务器
B.
域名服务器逻辑上构成一定的层次结构
C.
域名解析总是从根域名服务器开始
D.
递归解析是域名解析的一种方式
【简答题】John Smith was an old porter. He worked at the station. Every day he was busy carrying heavy things for the people. He was careful with his work. He was kind to everyone. He was always ready to help o...
【单选题】听力原文：M: I'm sorry, Madam. The train is somewhat behind the schedule. Could you please take a seat and I'll tell you as soon as we know something definite. W: Thank you. I'11 just sit here and read the...
A.
It's on time.
B.
It's crowded.
C.
It's empty.
D.
It's late.
【简答题】读下图，请在赤道上用箭头画出地球自转方向。
【单选题】关于Internet域名系统的描述中，错误的是( )。
A.
域名解析需要一组既独立又协作的域名服务器
B.
域名服务器逻辑上构成一定的层次结构
C.
域名解析总是从根域名服务器开始
D.
递归解析是域名解析的一种方式
【单选题】听力原文：M: I'm sorry, Madam. The train is somewhat behind schedule. Take a seat, and I'll notify you as soon as we know something definite. W: Thank you. I'll just sit here and read a magazine in the mea...
A.
The train is crowded.
B.
The train is empty.
C.
The train is late.
D.
The train is leaving.
【单选题】( 41 ）关于 Internet 域名系统的描达中，错误的是
A.
）域名解析需要一组既独立又协作的域名服务器
B.
）域名服务器逻辑上构成一定的层次结构
C.
）域名解析总是从根域名服务器开始
D.
）递归解析是域名解析的一种方式
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