单项选择题

At present, it is not possible to confirm or to refute the suggestion that there is a causal relationship between the amount of fat we eat and the______ of heart attacks.

A．incidence
B．impetus
C．capture
D．emergence
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单项选择题
Since a circle has no beginning or end, the wedding ring is accepted as a symbol of ______ love.
A．successive
B．consecutive
C．eternal
D．insistent
单项选择题
In order to keep the line moving, customers with lengthy ______ are required to do their banking inside.
A．transit
B．transactions
C．turnover
D．tempos
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