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【单选题】Halloween originated as a celebration connected with evil spirits. Witches flying on broom sticks with black cats, ghosts, goblins (丑妖怪)and skeletons(骷髅) have all evolved as sym bols of Halloween. The...
A.
Green.
B.
Pink.
C.
Black.
D.
Yellow.
【单选题】If you want to spark a heated debate at a dinner party, bring up the topic of genetically modified foods．For many people, the concept of genetically altered, high-tech crop production raises all kinds...
A.
The world's food problems.
B.
The new advancement in biotech.
C.
The characteristics of genetically modified foods.
D.
How biotech can help solve the world's food problems.