单项选择题

As to the stem-cell research, the Bush Administration's attitude is one of ______.

A．skepticism.
B．disapproval.
C．ambivalence.
D．prudence.
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单项选择题
The word enervated in the first paragraph probably means ______.
A．weakened.
B．demolished.
C．vitalized.
D．enlivened.
单项选择题
On which of the following aspects does Frisen disagree with some radicals
A．Whether research should be done on embryonic stem cells.
B．Whether research should be done on adult stem cells.
C．When should people expect a drug for Parkinson's.
D．When should clinical trials of stem-cells research begin.
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