There are only two animals that have larger brains than man, the whale and the elephant. Yet, in proportion to his size, man's brain is larger. (19[C])Man's usually weighs about three pounds or a little more, and this is about one-fortieth of the weight of his whole body. The whale's body, on the other hand, is a thousand times heavier than its brain, while the elephant's body is about five hundred times as heavy.
But a man who has a large brain is not necessarily more intelligent than one whose brain is smaller. We know that geniuses have existed who have had very large brains, but there have been others whose brains were rather small. Idiots have been known to have very large brains.
(20[D])We do not understand precisely why some people are more intelligent than others. Whether our brains are relatively large or small is less important than that we try to do our very best.
This article is mainly about ______.
A.the weight of a whale's brain
B.the brains of geniuses
C.the size of a person's brain and his intelligence
D.the intelligence of the elephant
第3题
A.20t
B.50t
C.60t
D.l00t
第4题
在热轧钢筋电弧焊接头拉伸试验中,()个接头试件抗拉强度不低于该级别钢筋规定的强度,并应至少有()个试件是延性断裂。
A.3,2
B.2,1
C.3,3
第8题
A.强度等级不同
B.强度等级相同
C.试验龄期不同
D.试验龄期相同
E.生产工艺条件和配合比基本相同
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