单项选择题

A．Handedness and the genetic theory.
B．Identical twins.
C．Birth parents and adopted parents.
D．Famous left-handed people in the world.
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单项选择题
A．Potatoes are more nutritional than eggs.B．The eggs are next to the potatoes.C．Potatoes and eggs are both nutritional foods.D．The second course will be potatoes and eggs.
A．Potatoes are more nutritional than eggs.
B．The eggs are next to the potatoes.
C．Potatoes and eggs are both nutritional foods.
D．The second course will be potatoes and eggs.
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