Each day every person in the United States throws away more than five pounds of garbage(垃圾). There is more garbage now than ever before and most of it is made up of the packages and cans in which we put our food. The traditional way of getting rid of solid wastes is quickly becoming inadequate. Many cities are experimenting with newer ways of handling their growing piles of garbage.
One of these new ways is "recycling"(回收使用). Through recycling usable materials are taken out of garbage and made into something else. These usable parts of garbage are put through the cycle of going from a raw material to a finished product again.
In some cities a machine called Hydrapulper is being used to help recycle garbage. A Hydrapulper is like a huge mixing machine. The garbage is dropped onto a conveyor belt (传送带) that feeds the machine. At the same time, water is pumped into the Hydrapulper. With a mixing action, the Hydrapulper throws out the heavy metal objects tha
A. It throws away glass and sand from garbage.
B. It collects heavy metal objects for selling.
C. It separates garbage into useful and useless things.
D. It pumps water into garbage and mixes it.
In the United States, the first day-nursery was opened in 1854. Nurseries were established in various areas during the (1) half of the 19th century; most of them were (2) Both in Europe and in the U. S. , the day-nursery (3) received great (4) during the First World War, when (5) of manpower caused the industrial employment (6) numbers of women. In some European countries nurseries were established (7) in munitions (军火)plants, under direct government (8) Although the number of nurseries in the U. S. also rose (9) , this rise was accomplished without government aid of any kind. During the years following the First World War, (10) , Federal, State, and local governments gradually began to exercise a measure of control over the day-nurseries, chiefly by (11) them and by inspecting and regulating the conditions within the nurseries.
The (12) of the Second World War was quickly followed by an
A. formulating
B. labeling
C. patenting
D. licensing
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