单项选择题

The passage mentions all of the following as factors important to the success of a new food crop EXCEPT the ______.

A．practicality of storage of the crop
B．security of the crop yield
C．quality of the crop's protein
D．cultural acceptability of the crop
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单项选择题
The main idea of this passage is ______.
A．vicious and dangerous sports should be banned by law
B．people are willing to pay vast sums money to see violence
C．to compare two different attitudes towards dangerous sports
D．people are bloodthirsty in sports
单项选择题
Which of the following best describes the organization of the first paragraph
A．a suggestion is made and arguments in its favor are provided.
B．a criticism is imposed and an alternative proposal is suggested.
C．a generalization is advanced and supporting evidence is provided.
D．an example is analyzed and general conclusions are derived from it.
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