单项选择题

How does the author feel about the prospects of achieving unity in the discussions of international research

A．Hopeful.
B．Revolted.
C．Doubtful.
D．Confident.
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单项选择题
Why does the author suggest that some people are urged to defer in discussions of international research
A．Because there is a lack of equality between the relevant parties.
B．Because of pressure from the local communities.
C．Because of pressure from the international community.
D．Because there is a temptation to think in their own favor.
单项选择题
The word thorny ( Line 4, Para. 1 ) most probably means ______ .
A．prickly
B．difficult
C．misunderstood
D．sharp
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