单项选择题

The best title of the passage is _________.

A．Exercise and the Health of Heart
B．The Difference between Men and Women
C．Heart and Health
D．Why Do Women Live Longer than Men
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单项选择题
The word innovations in the second paragraph means _________.
A．new theory
B．new phenomenon
C．changes
D．new inventions
单项选择题
According to Leo Hickey of Yale University, which of the following may have spawned more advanced species of land animals
A．The barren ocean floor.
B．The Arctic.
C．The rain forest.
D．Temperate Zones.
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