单项选择题

The purpose of this selection is to ______.

A．describe the superiority of the developed nations
B．stress the need for scientific and educational development
C．prove that underdeveloped nations are backward
D．show the poverty and ignorance of Third World countries

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单项选择题

A．slip upB．show upC．slow downD．slip down

A．slip up
B．show up
C．slow down
D．slip down

单项选择题

One of the solutions suggested to improve the conditions of underdevelopment is ______.

A．to build more factories
B．to obtain technical advisors from the Western world
C．to upgrade the educational and science programs
D．to increase production and raise profits