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.

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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.

单项选择题

It can be inferred from the last paragraph that other historians ______.

A．follow in the footsteps of Nazism and communism.
B．are very cautious in linking Western culture and modernity.
C．focus their attention on relatively specific topics.
D．hold drastically different views from Landes.