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artificial
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单项选择题
A．Shortening their news stories.B．lowering the prices of their newspapers.C．Adding variety to their newspaper content.D．Including more advertisements in their newspapers.
A．Shortening their news stories.
B．lowering the prices of their newspapers.
C．Adding variety to their newspaper content.
D．Including more advertisements in their newspapers.
单项选择题
A．It keeps blood vessels from being blocked.B．It speeds up their recovery after surgery.C．It increases the blood flow to the heart.D．It adjusts their blood pressure.
A．It keeps blood vessels from being blocked.
B．It speeds up their recovery after surgery.
C．It increases the blood flow to the heart.
D．It adjusts their blood pressure.
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