单项选择题

Food canning technology makes it possible to______.

A．increase the amount of food products.
B．make food more delicious
C．eat previously seasonal food at any time
D．grow strange plants
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单项选择题
The expression a bird's-eye view means______.
A．to see with bird's eyes
B．a bird looks at a beautiful view
C．a survey from a high position looking down
D．a famous place with beautiful scenery
单项选择题
Anthropologists call the men in modem centuries Legless because ______.
A．people forget how to use his legs and seldom walk anymore
B．people like to sit in ears, buses and trains
C．lifts and escalators prevent people from walking
D．people's legs are injured by modem transportation devices
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