（全国通用）2014届高考英语一轮单元复习限时强化训练四_高考复习指南

　　答案　C　[细节推理题。根据第二段提及的科学家的国籍可推测出，Canada属于北美，而Britain and Sweden属于欧洲。]

　　6．Professor Prusinkiewicz compares the cars on the side roads to ________.

　　A．plant stems　

　　B．plant buds

　　C．the leaves of a plant　

　　D．the roots of a plant

　　答案　B　[细节理解题。根据文章第五、六段可知，Professor Prusinkiewicz把植物的芽比作马路支路上的汽车。]

　　7．To make the buds on the side of the stem to grow better，the main shoot should ________.

　　A．be cut off

　　B．be protected

　　C．be watered as much as possible

　　D．be given much auxin

　　答案　A　[推理判断题。根据第六段if that main shoot is pruned，other buds below it can start exporting.可知，为了让枝干上的芽生长，树顶的主芽应修剪掉。]

　　8．According to the passage，which of the following is TRUE?

　　A．Researchers have recently found out that the growing tip of a plant produces hormones.

　　B．Auxin has a direct effect on buds to keep branches from growing.

　　C．Buds on the side of the stem can't produce hormones.

　　D．In order to grow，the buds on the side of the stem export the hormones into the main stem.

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