单选题：So little ___ about stock exchange that the lecture was com

题目内容：

So little ___ about stock exchange that the lecture was completely beyond me. A．did I know
B．I had known
C．I knew
D．was I known

参考答案：

答案解析：

Mayor as well as volunteer workers _______ the newly-built s

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四岁的丽丽知道小明是自己的哥哥，但当问她小明有没有妹妹时，她却回答没有。这体现了丽丽不具有（）思维特征。A．可逆性 B．不守恒性 C．自我中心性 D．守恒性

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