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【简答题】
The Canadian Arctic was a vast and treeless polar desert that is covered with snow for most of the year. Venture into this terrain and you get some idea of the hardships facing anyone who calls this home. Farming is out of the question and nature offers meager pickings. Human first settled in the Arctic a mere 4,500 years ago, surviving by exploiting sea mammals and fish. The environment tested them to the limits: sometimes the colonists were successful, sometimes they failed and vanished. But around a thousand years, one group that emerged well adapted to cope with the Arctic environment. These Thule people moved in from Alaska, bringing kayaks, sleds, dogs, pottery and iron tools. They are the ancestors of today’s Inuit people. Life for the descendants of the Thule people is still harsh. Nunavut is 1.9 million square kilometers of rocks and ice, and a handful of islands around the north pole. It is currently home to 2,500 people, all but a handful of them indigenous Inuit. Over the past 40 years, most have abandoned their nomadic ways and settled in the territory’s 29 isolated communities, but they still rely heavily on nature to provide food and clothing. Provisions available in local shops have to be flown into Nunavut on one of the most costly air networks in the world, or brought by supply ship during the few ice-free weeks of summer. It would cost a family around 7,000 pounds a year to replace meat they obtained themselves through hunting with imported meat. Economic opportunities are scare, and for many people state benefits are their only income. If you visit the Canadian Arctic, you immediately appreciate the problems faced by people for whom this is called home.The territory of Nunavut consists of little more than ice, rock and a few___4___ in recent years.
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【单选题】将地球作为圆球体时,中分纬度改正量是:
A.
等于0º
B.
大于0º
C.
小于0º
D.
以上均可能
【单选题】与血的生成、运行有关的两脏是:
A.
心肾
B.
心脾
C.
心肝
D.
心肺
【判断题】中国古典园林的游览讲究“游”和“停”。
A.
正确
B.
错误
【单选题】以下哪组广域网技术采用的是分组交换技术?()
A.
电话拨号连接、DDN、ADSL
B.
X.25、帧中继、ATM
C.
ISDN、ADSL、DDN
D.
HFC(CableModem)、ADSL、ATM、X.25
【简答题】下列分组交换网络中,采用的交换技术与其他 3 个不同的是( )网。 A. IP B. X.25 C. 帧中继 D. ATM
【单选题】帧中继采用的交换技术是( )。
A.
分组交换
B.
电路交换
C.
报文交换
D.
以上均不对
【单选题】下列分组交换网络中,采用的交换技术与其他3个不同的是 网。
A.
IP
B.
X. 25
C.
帧中继
D.
ATM
【单选题】与血的生成、运行有关的两脏是:
A.
心与肾
B.
肺与肾
C.
心与脾
D.
肝与肺
E.
脾与肾
【单选题】帧中继技术采用的交换技术是
A.
线路交换
B.
分组交换
C.
快速分组交换
D.
信元交换
【判断题】中国古典园林的游览讲究“游”和“停”。
A.
正确
B.
错误
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