单项选择题

Cancer Research Campaign is most possibly a ______.

A．medical journal
B．research institute
C．private company
D．governmental agency
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单项选择题
According to the passage, which of the following is true
A．Most people believe childhood leukaemia is due to environmental factors.
B．Population mixing best explains the cause of childhood leukaemia.
C．Radiation has nothing to do with childhood leukaemia.
D．Children born in a large town are at higher risk of leukaemia.
单项选择题
Which statement can be supported by Heather Dickinson and Louise Parker's new findings
A．Radiation has contributed to the disease.
B．Putting a lot of people from rural area in a large towns increases the risk of childhood leukaemia.
C．Population mixing is the most important reason for leukaemia cluster.
D．Childhood leukaemia is caused by an unusual infection.
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