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【单选题】
有科学实验表明．大多数人并没有同时处理多项事务的能力。只要一上网，人们的工作记忆就会严重超载．导致大脑额叶难以聚精会神地关注任何一件小事。同时，由于神经通路具有可塑性，上网越多。对大脑适应精力分散状态的训练就越多，这也是为什么习惯上网的人，只要离开互联网，就会感到无所适从。大脑的全面发展要求我们既能迅速解析各种信息，又能无拘无束地沉思冥想；既要能在互联网数字世界中积极工作．又要能隐退到田园中静思遐想。今天的问题在于，我们正在丧失在两种截然不同的思想状态之间保持平衡的能力。根据上述文字．下列说法正确的一项是( )。
A.
网络限制了人类大脑的全面发展能力
B.
网络使人们处理多项事务的能力衰退
C.
上网会使人的记忆力下降．精力分散
D.
人类原本具备自由转换思想状态的能力
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【单选题】In spite of his hard work no one can________for him as his fault in work has resulted in a heavy loss of one million dollars.
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【简答题】空间两直线的相对位置关系有:平行、 和交叉三种关系。
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【简答题】空间两直线的相对位置有 、相交和交叉三种。
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A.
send back word
B.
say a word
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make words
D.
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