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已知实数6ec8aac122bd4f6e满足6ec8aac122bd4f6e那么6ec8aac122bd4f6e的最小值为(     )

   A.6ec8aac122bd4f6e                                                            B. 6ec8aac122bd4f6e

   C.6ec8aac122bd4f6e                                                          D. 6ec8aac122bd4f6e

 

阅读框图,则输出6ec8aac122bd4f6e(     )

说明: 6ec8aac122bd4f6e

   A.40

   B.26

   C.7

   D.5

 

直线6ec8aac122bd4f6e截圆6ec8aac122bd4f6e所得的劣弧所对圆心角为(     )

   A.306ec8aac122bd4f6e                         B.456ec8aac122bd4f6e                       C.606ec8aac122bd4f6e                       D.906ec8aac122bd4f6e

 

下列命题中正确的个数是(     )

①若直线6ec8aac122bd4f6e上有无数个点不在平面6ec8aac122bd4f6e内,则6ec8aac122bd4f6e

②若直线6ec8aac122bd4f6e与平面6ec8aac122bd4f6e平行,则6ec8aac122bd4f6e6ec8aac122bd4f6e内任意一条直线平行

③如果两条平行线中一条与一个平面平行,那么另一条也与这个平面平行

④若直线6ec8aac122bd4f6e与平面6ec8aac122bd4f6e平行,则6ec8aac122bd4f6e6ec8aac122bd4f6e内任意一条直线不相交

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

 

已知三个函数模型:6ec8aac122bd4f6e6ec8aac122bd4f6e6ec8aac122bd4f6e,当6ec8aac122bd4f6e,随6ec8aac122bd4f6e的增大,三个函数中的增长速度越来越快的是(     )

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

 

已知6ec8aac122bd4f6e6ec8aac122bd4f6e6ec8aac122bd4f6e6ec8aac122bd4f6e,那么下列各式中错误的是(     )

A. 6ec8aac122bd4f6e                    B. 6ec8aac122bd4f6e

C. 6ec8aac122bd4f6e                                     D. 6ec8aac122bd4f6e

 

下列函数(1)6ec8aac122bd4f6e;(2)6ec8aac122bd4f6e,(3)6ec8aac122bd4f6e,(4)6ec8aac122bd4f6e中是奇函数的有(     )

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

 

6ec8aac122bd4f6e6ec8aac122bd4f6e,则6ec8aac122bd4f6e=(     )

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

 

集合6ec8aac122bd4f6e的所有子集共有(     )

   A.9个                         B.8个                       C.4个                       D.3个

 

下列结论中成立的(     )

   A.6ec8aac122bd4f6e                           B.6ec8aac122bd4f6e

C.6ec8aac122bd4f6e                                  D.6ec8aac122bd4f6e

 

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