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已知是平面向量，下列命題中真命題的個(gè)數(shù)是(      )

①                   ②

③            ④

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

執(zhí)行如圖所示的程序框圖，若輸出的，則輸入的整數(shù)的最大值為(      )

A. 7                                        B. 15                                      C. 31                                      D. 63

已知函數(shù)的圖像關(guān)于直線對(duì)稱，則最小正實(shí)數(shù)的值為(      )

A.                                     B.                                      C.                                      D.

已知數(shù)列滿足，，則(      )

A. 121                                   B. 136                                   C. 144                                   D. 169

一個(gè)三條側(cè)棱兩兩互相垂直并且側(cè)棱長(zhǎng)都為的三棱錐的四個(gè)頂點(diǎn)全部在同一個(gè)球面上，則該球的表面積為(      )

A.                            B.                         C.                      D.

已知復(fù)數(shù)，且為實(shí)數(shù)，則(      )

A.                                      B.                                      C.                                     D.

在中產(chǎn)生區(qū)間上均勻隨機(jī)數(shù)的函數(shù)為“( )”,在用計(jì)算機(jī)模擬估計(jì)函數(shù)的圖像、直線和軸在區(qū)間上部分圍成的圖形面積時(shí)，隨機(jī)點(diǎn)與該區(qū)域內(nèi)的點(diǎn)的坐標(biāo)變換公式為(      )

A.                                       B.

C.                                     D.

已知拋物線的焦點(diǎn)為，直線與此拋物線相交于兩點(diǎn)，則(      )

A.                  B. C.          D.

如圖所示是一個(gè)幾何體的三視圖，則該幾何體的體積為(      )

A.                         B.

C.                            D.

若函數(shù)對(duì)任意的都有，且，則(      )

A.                           B.                           C.                     D.