| Which of your two hands do you use much
better Very few of us can use both of our hands equally well. Most of us are
right-handed. Only about five people out of a hundred are left-handed. Newborn
babies can grasp objects with either of their hands, but in about two years they
usually prefer to use their right hands. Scientists don’t know why this happens. They used to think that we inherited this tendency from our animal ancestors, but this may not be true. Monkeys are our closest relatives in the animal world. Scientists have found that monkeys prefer to use one of their hands more than the other, but it can be either hand. There are as many right-handed monkeys as there are left-handed ones. Next time you visit the zoo, watch the monkeys carefully. You’ll see that some of them will prefer to swing from their right hands, and A. as well as B. not so well as C. much better than D. more better than [单项选择]
Which best sums up the purpose of the prize offered by the Foundation A. To encourage the Green movement in San Francisco. B. To encourage the environmental movement across the world. C. To reward individuals on the American Continent. D. To establish the image of the foundation in the world. [填空题]Substances which are made up of only one kind of atom are called S36 ______ and there are about a hundred of these -- the same S37 ______as there are kinds of atom. These are the substances from which everything else is made. Aristotle taught that there were four elements -- earth, air, fire, and water -- but he was very wrong. None of these is an element in any sense of the word and S38 ______
There is nothing obvious about the appearance of an element which makes it different from other substances, and this explains why man take so long to discover the building blocks from which his world is made, 0nly patient and S39 ______ were able to show that sulfur, copper, and diamond were elements, but air, water, and sand were not. S40 ______ but have to be prepared in the laboratory. For example, the two elements of which water is made are the gases oxygen and hydrogen; oxygen occurs in the air, but it is mixed with a large amount of other gases, and hydrogen is not even present in the
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