单项选择题

A．are less sensitive
B．open and close more quickly
C．take in more rays
D．filter out ultra-violet rays less sufficiently
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单项选择题
A．providing aid and promoting democracyB．promoting democracyC．controlling a deadly diseaseD．Both B and C
A．providing aid and promoting democracy
B．promoting democracy
C．controlling a deadly disease
D．Both B and C
单项选择题
A．not to charge Sharon with corruptionB．to indict Sharon for corruptionC．to charge Sharon with the failure of the Greek Island AffairD．not to indict Sharon for the failure of the Greek Island Affair
A．not to charge Sharon with corruption
B．to indict Sharon for corruption
C．to charge Sharon with the failure of the Greek Island Affair
D．not to indict Sharon for the failure of the Greek Island Affair
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