How do homeowners determine the reliability of a house-sitter？
A. They attend a house-sitter"s party.
B. They check house-sitter"s references.
C. They interview house-sitter"s friends.
D. They look at house-sitter"s transcripts.
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Which of the following can be a substitute for the phrase "emanate from"？
A. Thrive on.
B. Account for.
C. Originate from.
Descend from.
Why did the sugar cane farmers bring cane toads to Australia？
A. To enrich the variety of species.
B. To deal with cane beetles.
C. To balance the＞eco-system.
D. To strengthen the food chain.
食品检验的主要内容概括起来包括食品营养成分的检验、()的检验、食品安全性的检验和食品的感官检验等。
A. 食品添加剂
B. 食品辅助材料
C. 食品外观形状
D. 食品功能成分
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