Dr Yuan Longping grows _____ is called super hybrid rice, _____ has a high output.

A. what; which B. that; what

C. that; which D. what; that

A

【解析】試題分析：考查定語從句。前一個(gè)為定語從句缺主語，用what領(lǐng)導(dǎo)，后一個(gè)為非限制性定語從句，缺主語，that是不能領(lǐng)導(dǎo)非限制性定語從句的，句意：袁隆平種植了雜交水稻，它有很高的產(chǎn)量，故選A

考點(diǎn)：考查定語從句

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