单项选择题

The second paragraph makes use of which of the following

A．Specific examples.
B．Analogy.
C．Metaphor.
D．Quotation.
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单项选择题
It can be inferred from the passage that the decision to study an organism may sometimes be influenced by______.
A．its practical or commercial benefits to society
B．the nature and prevalence of its fossilized remains
C．the relative convenience of its geographical distribution
D．its similarity to one or more better known species
单项选择题
It can be inferred from the passage that many zoologists assume that a large diversity among species of a given class of organisms typically leads to which of the following
A．Difficulty in classification.
B．A discontinuous fossil record.
C．A greater chance of survival over time.
D．Numerical abundanc
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