Since Darwin, biologists have been firmly convinced that nature works without plan or meaning, pursuing no aim by the direct road of design. But today we see that this conviction is a fatal error. Why should evolution, exactly as Darwin knew it and described it, be planless and irrational? Do not aircraft design engineers work, at precisely that point where specific calculations and plans give out, according to the same principle of evolution, when they test the serviceability of a great number of statistically determined forms in the wind tunnel, in order to choose the one that functions best? Can we say that there is no process of natural selection when nuclear physicists, through thousands of computer operations, try to find out which materials, in which combinations and with what structural form, are best suited to the building of an atomic reactor? They also practise no designed adaptation, but work by the principle of selection. But it would never occur to anyone to call their method planless and irrational.

[单选题]I have been convinced that the print media are usually more and more reliable than television.A．accurateB．ridiculousC．urgentD．shallow

[试题](50) Darwin was convinced that the loss of these tastes was not only a loss of happiness, but might possibly be injurious to the intellect, and more probably to the moral character.此处译文为：

[试题]D．arwin was convinced that the loss of these tastes was not only a loss of happiness, but might possibly be injurious to the intellect, and more probably to the moral character.

[单选题]These classical works have been simplified on behalf of beginners of Englis

[单选题]Since World War II, considerable advances have been made in the area of hea

[单选题]Since World War II, considerable advances have been made in the area of hea

[单选题]Since World War II, considerable advances have been made in the area of hea

[单选题]Since World War II, considerable advances have been made in the area of hea

[单选题]Since World War II, considerable advances have been made in the area of hea

[单选题]Since World War II, considerable advances have been made in the area of hea