单项选择题

In the section of "Winners", the authors' objective is to______.

A．convince the reader that winning is important
B．describe the nature of winning and achieving
C．state the characteristics of a winning person.
D．explain how to be a winner

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热门试题

单项选择题

The main difference between natural and artificial selection is that human beings______.

A．control the direction of artificial selection
B．control the direction of natural selection
C．make new genes in artificial selection
D．make new genes in natural selection

单项选择题

Which of the following statements is NOT true

A．Members of a species differ from one another.
B．All differences between individuals are inherited.
C．Two organisms with identical genes may grow to different sizes.
D．Not all of the organisms can live to reproduc