单项选择题

The primary purpose of this passage is to ______.

A．report facts
B．call for action
C．argue for a new perspective
D．condemn a social phenomenon
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单项选择题
One comparison mentioned in the last paragraph was made between ______.
A．Pacific test participants and those who undertook the Nevada test
B．Nevada atomic veterans and those who didn't take part in any nuclear tests
C．Veterans in Nevada and Pacific atomic tests and the comparison group
D．half of Nevada test participants and half of the group of no test participants
单项选择题
How different is the group of Nevada test participants from their South Pacific counterparts
A．The former shows a higher leukemia death rate than the comparison group.
B．The former shows a lower leukemia death rate than the comparison group.
C．The former shows a higher death rate than the latter.
D．The former shows a lower death rate than the latter.
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