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将内装物按要求的数量装入包装容器的操作称为充填。
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A．growsB．is grownC．are grownD．were grown
The Indians today live in【61】【62】their ancestors (祖先), most of whom were famers.【63】 work in the mines, for mining is the most important industry in Bolivia.【64】all the mining products,【65】is the most important, which【66】three fourths of all Bolivia's exports (出口). The eastern slopes (斜坡) of the Andes, since there are very few roads there, are fertile (富饶的)【67】not highly developed. The two primary【68】of transportation are river boats and porters. East of the hill region【69】the great plains【70】tropical (热带的) plants【71】. A【72】problem for Bolivia is the transport of food from the warm regions, where it is grown, to the mountainous regions, where most of the people live.
Bolivia 【73】 its independence from Spain about a hundred years ago. It has been slow in developing,【74】its rich resources【75】a better future in it.
(41)
To us it seems so natural to put up an umbrella to keep the water off when it rains, but actually the umbrella was not invented as protection against rain. Its first use was as a shade against the sun.
Nobody knows who first invented it, but the umbrella was used in very ancient times. Probably the Chinese were the first to use it in the eleventh century B. C.
We know that the umbrella was used in ancient Egypt and Babylon as a sunshade. And there was a strange thing connected with its use: it became a symbol of honor and authority. In the Far East in ancient times , the umbrella was allowed to be used only by the king or by those in high office.
In Europe, the Greeks were the first to use the umbrella as a sunshade. And the umbrella was in common use in ancient Greece. But it is believed that the first persons in Europe to use the umbrella as Protection against the rain were the ancient Romans. During the Middle Ages, the use of the umbrella practically disappeared. Then it appeared again in Italy in the late sixteenth century. And again it was considered a symbol of power and authority. By 1680, the umbrella appeared in France, and later on in England.
By the 18th century the umbrella was used against rain throughout most of Europe. Umbrella have not changed much in style. during all this time, though they have become much lighter in weight. It wasn't until the twentieth century that women’s umbrellas were made, in a whole variety of colors.
According to this passage, the umbrella was probably first invented______.
A．fully bloodedB．full - bloodedC．blooded fullyD．full - blood
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