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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单项选择题
What can we learn about the result of the latest study
A．There was a significant difference in total deaths from cancer between the two groups.
B．There was no significant difference in death rates between the two groups.
C．The comparison group has a lower death rate.
D．More veterans died from leukemia than from other cancers.
单项选择题
The latest study includes a comparison made between ______.
A．healthy veterans and unhealthy veterans
B．nuclear test participants and those with no radiation exposure
C．the veterans who are still alive and those who have died
D．people who died of cancer and people who took part in atomic tests
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