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．rupture
D．emergence
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单项选择题
The vision of that big black Car hitting the sidewalk a few feet from us will never be _______ from my memory.
A．ejected
B．escaped
C．erased
D．omitted
单项选择题
One of the examination questions _______ me completely and 1 couldn't answer it.
A．baffled
B．mingled
C．provoked
D．diverted
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