单项选择题

Neon light is utilized in airport because it can permeate fog.

A. pass through
B. transmit
C. suspend
D. break up
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单项选择题
Pocahomta, a seventeenth century Powhatan Indian, went to the Jamestown colony as her father’s emissary.
A. ward
B. attendant
C. messenger
D. translator
单项选择题
Biologists have ascertained that specialized cells convert chemical energy into mechanical energy.
A. determined
B. argued
C. hypothesized
D. griped
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