单项选择题

A．The heart pumps blood in two directions.
B．Time 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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When did the corpuscular theory of light prevail
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.
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