单选题：In the fourth paragraph, the Jarvic-7 is__________.

题目分类：卫生类
题目类型：单选题
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In the fourth paragraph, the Jarvic-7 is__________. A．the most expensive mechanical heart
B．a mechanical heart used in the 1980s
C．as advanced as Abiocor
D．replacing Abiocor

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Paragraph 2 __________

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Fear is the most difficult emotion to change.A．Right B．Wrong C．Not mentioned

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The committee was asked to render a report on the housing situation.A．copy B．pub

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回答(8)题A．Since B．Over C．Till D．Until

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