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       ④ 若6ec8aac122bd4f6e,则6ec8aac122bd4f6e.

       其中正确命题的个数是                                                                                    (    )

       A.1                        B.2                        C.3                        D.4

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       ③ 若6ec8aac122bd4f6e是两条异面直线,6ec8aac122bd4f6e,则6ec8aac122bd4f6e

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    ② 若6ec8aac122bd4f6e,则6ec8aac122bd4f6e

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       ① 若6ec8aac122bd4f6e,则6ec8aac122bd4f6e

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9.已知两条不重合的直线6ec8aac122bd4f6e和两个不重合的平面6ec8aac122bd4f6e,有下列命题:

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6ec8aac122bd4f6e8.函数6ec8aac122bd4f6e的大致图象为                                                                         (    )

 

 

 

 

 

 

 

 

 

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       A.6ec8aac122bd4f6e                   B.6ec8aac122bd4f6e                C.6ec8aac122bd4f6e                      D.6ec8aac122bd4f6e

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7.在棱长为6ec8aac122bd4f6e的正方体6ec8aac122bd4f6e内任取一点6ec8aac122bd4f6e,则点6ec8aac122bd4f6e到点6ec8aac122bd4f6e的距离小于等于6ec8aac122bd4f6e

   的概率为                                                                                                           (    )

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6.若6ec8aac122bd4f6e,且6ec8aac122bd4f6e,则6ec8aac122bd4f6e等于(    )

       A.-56                     B.56                      C.-35                     D.35

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       C.6ec8aac122bd4f6e                   D.6ec8aac122bd4f6e

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