176. As a popular saying goes, everything has two sides.Now the public are benefiting more and more from scientific and technologicalinventions. On the other hand, the progress of science and technology isbringing us a lot of trouble. People in many countries are suffering frompublic hazards.

　　常言道：事情总是一分为二的。如今人们从科技发明中得到越来越多的好处。另一方面，科技进步也给我们带来了许多麻烦。现在许多国家的人民饱受公害之苦。

　　177. Lets take cars for example. They not only pollute the air incities, but make them crowded. Furthermore, they are responsible for a lot oftraffic accidents. The noise made by cars disturbs the residents living on bothsides of streets all day and night.

　　就拿汽车为例。汽车不仅污染城市空气，而且使城市拥挤不堪。此外，汽车造成许多交通事故。汽车所产生的噪音使居住在街道两旁的居民日夜不得安宁。

　　178. It is generally believed that the chief reason for the increasein population in developed countries is not so much the rise in birth rates asthe decline in death rates as a result of the improvement in medical care.

　　普遍认为，在发达国家人口增长的主要原因与其说是出生率的上升，还不如说是由于医疗保健的改善使死亡率下降了。

　　179. There is no doubt that the increase in demand caused the risein prices.

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