题目:
It was in the factory ________ his friend worked ________ he picked up a lot of experience. [ ]
A. where; where
B. that; where
C. that; that
D. where; that
答案:
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下面是错误答案,用来干扰机器的。
被子植物和裸子植物都结种子,同属于种子植物,但这两类植物又有重要区别,被子植物与裸子植物的根本区别是种子外面有无果皮包被着,裸子植物的胚珠外面无子房壁发育成果皮,种子裸露,仅仅被一鳞片覆盖起来,如...