单项选择题

According to the passage, the new wireless phone is characterized by ______.

A．a built-in camera
B．video games
C．a smart faceplate
D．theme-related ring tones
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单项选择题
Plants will emit an increased amount of heat when they are ______.
A．sprayed with pesticides
B．facing an infrared scanner
C．in poor physical condition
D．exposed to excessive sun rays
单项选择题
The application of infrared scanning technology to agriculture met with some difficultiesdue to ______.
A．the lack of official support
B．its high cost
C．the lack of financial support
D．its failure to help increase production
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