赞题库-背景图
单项选择题

Freeze-dried foods ______.

A．always contain meat
B．need refrigeration
C．are dried and then frozen
D．last for a long time unspoiled
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热门试题

单项选择题It can be inferred that Scott was a hero because ______.

A．he was a sea captain
B．he crossed a river full of ice
C．he saved the boat almost at the price of his life
D．he saved many people with a tugboat

单项选择题The best title for this selection is ______.

A．Food from Coal and Gas
B．Non-Spoiling and New Foods
C．Spacecraft Food
D．The Shortage of Food