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问题 选择题

在第六次全国人口普查中，南京市常住人口约为800万人，其中65岁及以上人口占9.2%，则该市65岁及以上人口用科学记数法表示约为（　　）

A．0.736×106人

B．7.36×104人

C．7.36×105人

D．7.36×106人

答案

该市65岁及以上人口：8000000×9.2%=736000（人）

将736 000人用科学记数法表示7.36×105人．

故选C．

单项选择题

脊髓灰质炎的瘫痪特点是（）

A.对称性迟缓性瘫痪，有感觉障碍

B.对称性迟缓性瘫痪，无感觉障碍

C.不对称性迟缓性瘫痪，有感觉障碍

D.不对称性迟缓性瘫痪，无感觉障碍

E.双下肢痉挛性瘫痪，无感觉障碍
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单项选择题

For each blank, choose the best answer from the four choices and write down on the answer sheet.

(1) is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.

(2) is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.

(3) functions with two layers of protocols. It can connect networks of different speeds and can be adapted to an environment as it expands.

(4) is the popular LAN developed under the direction of the IEEE 802.5.

(5) is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.

1（）

A．The MAC address

B．The IP address

C．The subnet address

D．The virtual address
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