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问题 填空题

进行变压器交流耐压试验时，对试验结果的分析判断，主要根据仪表指示，监听（），观察有无（）等异常情况进行综合判断。

答案

参考答案：放电声音；冒烟

单项选择题 共用题干题

进程P1、P2、P3、P4和P5的前趋图如下：若用PV操作控制进程P1～P5并发执行的过程，则需要设置5个信号量S1、S2、S3、S4和S5，进程间同步所使用的信号量标注在上图中的边上，且信号量S1～S5的初值都等于零，初始状态下进程P1开始执行。下图中a、b和c处应分别填写（1）；d和e处应分别填写（2），f和g处应分别填写（3）。

空白（2）处应选择（）

A.P（S1）和V（S5）

B.V（S1）和P（S5）

C.P（S2）和V（S5）

D.V（S2）和P（S5）
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单项选择题

Passage Two


Ask someone what they have done to help the environment recently and they will almost certainly mention recycling. Recycling in the home is very important of course. However, being forced to recycle often means we already have more material than we need. We are dealing with the results of that overconsumption in the greenest way possible, but it would be far better if we did not need to bring so much material home in the first place.
The total amount of packaging increased by 12% between 1999 and 2005. It now makes up a third of a typical household’s waste in the UK. In many supermarkets nowadays food items are packaged twice with plastic and cardboard.
Too much packaging is doing serious damage to the environment. The UK, for example, is running out of it for carrying this unnecessary waste. If such packaging is burnt, it gives off greenhouse gases which go on to cause the greenhouse effect. Recycling helps, but the process itself uses energy. The solution is not to produce such items in the first place. Food waste is a serious problem, too. Too many supermarkets encourage customers to buy more than they need. However, a few of them are coming round to the idea that this cannot continue, encouraging customers to reuse their plastic bags, for example.
But this is not just about supermarkets. It is about all of us. We have learned to associate packaging with quality. We have learned to think that something unpackaged is of poor quality. This is especially true of food. But it is also applied to a wide range of consumer products, which often have far more packaging than necessary.
There are signs of hope. As more Of us recycle, we are beginning to realize just how much unnecessary materials are collecting. We need to face the wastefulness of our consumer culture, but we have a mountain to climb.

The author uses figures in Paragraph 2 to show

A．the tendency of cutting household waste

B．the increase of packaging recycling

C．the rapid growth of supermarkets

D．the fact of packaging overuse
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