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单选题英语六级

2017-06-09

A．Amber mined from the Appalachian Mountains.

B．Amber with no imperfections.

C．Amber containing organic material.

D．Amber with no inclusions.

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参考答案

What type of amber is probably the most valuable for genetic research?
推断题。题目问什么品种的琥珀对于基因研究最有价值，根据最后一句可知是能够提取DNA的。因此，正确答案是C。

A．The difficulties faced by the colonists.

B．The skill of military heroes.

C．The courage of one man.

D．The cause of the Revolutionary War.

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A．He did not fight in the Revolution my War.

B．He did not really exist.

C．He was an important town leader.

D．He was not the only messenger.

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A．It was well planned.

B．It was completed in a short time.

C．It was led by military commanders.

D．It helped him get elected to public office.

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