单项选择题

A．The heart pumps blood in two directions.
B．The blood is circulated round the body in one direction only by the pumping action of the heart.
C．The blood moved with a backward and forward motion.
D．The heart pumps blood in all directions.
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单项选择题
A．Because Darwin had got a lot of facts.B．Because Darwin condemned the men of the churches for their nonsense.C．Because Darwin was not a religious believer.D．Because Darwin’s story of the world was different from theirs.
A．Because Darwin had got a lot of facts.
B．Because Darwin condemned the men of the churches for their nonsense.
C．Because Darwin was not a religious believer.
D．Because Darwin’s story of the world was different from theirs.
单项选择题
A．The relationship between mice, rats and monkeys.B．The relationship between diet and animals.C．The relationship between diet and man.D．The relationship between diet and health.
A．The relationship between mice, rats and monkeys.
B．The relationship between diet and animals.
C．The relationship between diet and man.
D．The relationship between diet and health.
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