单项选择题

Which of the followings is neither expressed nor implied in the passage as being a threat posed by mall to wildlife preservation

A．The discharge of chemical wastes into streams as a result of industrial development.
B．Large - scale housing development.
C．Poor coordination of international efforts at park and refuge management.
D．Introduction of species into environments.

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热门试题

单项选择题It can be inferred from the passage that studies of endangered species ______.

A．have revealed little of importance to improve wildlife preservation
B．are more likely to be carried out when a financially concerned interest group is involved
C．sometimes endanger the very species they hope to protect
D．show that endangered species can never be saved except at great cost

单项选择题In the author’s opinion, as seen in this passage, one outcome of the influence of the Life experience adherents has been ______.

A．the gradual subordination of the study of great literature in the schools
B．a narrowed interpretation of the theories of John Dewey
C．a sharp swing over to "learning through doing"
D．an end to rigorous study as a way of learning