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问题 选择题

居民阶梯电价，是指按照用户消费的电量分段定价，用电价格随用电量增加呈阶梯状逐级递增的一种电价定价机制。实行这一定价机制[ ]

A、目的在于抑制消费

B、可以引导绿色消费

C、不利于充分利用资源

D、有利于降低企业成本

答案

答案：B

单项选择题

You want to use the Web to let Eternal users or your customers look at corporate information. But you want to keep installation at the user end (66) and you don’t want just anyone to get (67) your databases.

That may be where an application server enters the picture. For more user machine independent, these t software packages, typically written in the (68) programming language.

for use on Windows NT-based systems, act as go-betweens linking browser-equipped end users to the databases that (69) the information they need to (70) 。

（66）处填（）。

A．simple

B．simply

C．single

D．singly
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单项选择题 A1型题

当某溶液的pH由7改变为4时，氢离子浓度增加了多少倍（）

A.0.001倍

B.3倍

C.30倍

D.100倍

E.1000倍
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