单项选择题

The word "streamline" in the second paragraph probably means ______.

A．strengthen.
B．simplify.
C．ascertain.
D．subvert.
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单项选择题
All of the following are the consequences of the research slowdown EXCEPT ______.
A．the negative impact on technical advancement.
B．the detriment to the culture of inquiry.
C．the loss of one's productivity.
D．the collapse of American dreams.
单项选择题
The most suitable title for the passage would be ______.
A．The Cell Lines.
B．The Stem-cell Research.
C．The Dangers of Delay.
D．Costs on American Patients.
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