单项选择题

The form and physiology of leaves vary according to the ______ in which they develop : for example, leaves display a wider range of adaptations to different degrees of light and moisture.

A. relationship
B. sequence
C. patterns
D. environment
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Alxender Woollcott’s flamboyant personality combined sharpness of wit with sentimentality.
A. devious
B. humorous
C. singular
D. showy
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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