单项选择题

The main idea of the passage might be ______.

A．the knowledge-based industries in developing countries
B．the economical competition home and abroad
C．the further considerations of the World Bank
D．the 'knowledge gap' between rich and poor countries

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单项选择题

According to the third paragraph, the sentence O' Leary has not backed away from that stance... means that ______.

A．she has not make out the standard
B．she has considered the position
C．she has not avoided the publication
D．she has not stuck to her own way

单项选择题

The phrase stumbling block may best refer to ______.

A．obstacle
B．motivation
C．acceleration
D．deceleration