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问题 选择题

在第六次全国人口普查中，宁波市常住人口约为760万人，其中鄞州区的人口约占18%．则鄞州区人口用科学记数法表示约为（     ）

A．0.1368×106人

B．1.368×105人

C．1.368×106人

D．1.36×103 万人

答案

答案：C

760万×18%=136.8万="1" 368 000=1.368×106．故选C

单项选择题

When you think of the Internet, you probably think of ".com." Just what do those three letters at the end of a World Wide Web address mean Every computer that hosts data on the Internet has a (71) numerical address. For example, the numerical address for the White House is 198.137.240.100. But since (72) people want to remember long strings of numbers, the (73) was developed. It is a critical part of the Internet’s technical infrastructure, correlates a numerical address to a word. To (74) the White House website, you could type its numerical address into the address box of your web browser. But most people prefer to use "www. whitehouse. gov." In this case, the domain name is (75) .

（72）处填（）。

A．most

B．more

C．few

D．every
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单项选择题

錾子的前刀面与后刀面之间夹角称为（）。

A.前角

B.后角

C.楔角

D.副后角
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