单项选择题

The wanting message about the Alar apple was given ______.

A．by Consumers Union
B．by a health center
C．through an news agency
D．through the government
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单项选择题
With regard to the pesticides in food, this passage seems to argue that ______.
A．parents should keeps their children from the food with pesticicles
B．they should be applied to fruits and vegetables wit caution
C．more research needs to be done on their harmfulness to health
D．they are not as threatening as said to children most of the time
单项选择题
The chronic reference doses (in boldface in Paragraph 3) refer to ______.
A．the safe levels of pesticide exposure
B．the amount of fruits one can safely eat
C．one's digestive capacity for fruits
D．health values of fruits and vegetables
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