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安徽省六安市第一中学2020-2021学年高二上学期开学考试数学(理)试题
安徽 高二 开学考试 2020-10-17 15次
特供卷

一、单选题添加题型下试题

2. 已知向量eqIdf087b35a5011425daaafbf14a5e61064eqId5f16eb46594d47b58ffc973b5cc2dd0d满足eqId7ed2d72002f3469fa844bce34253149b,且eqIdc6363ccacff44562a38bf4e5d83d26ffeqId58bf8eee966243fd925a8d89db0da593,则eqIdf087b35a5011425daaafbf14a5e61064eqId5f16eb46594d47b58ffc973b5cc2dd0d的夹角为(   )
A.30°B.45°C.60°D.120°
3. 设eqId761b2917a82b4524b8dbab7e6380f014是函数eqId565c5e1bd67a469c9d572c5e47c809fd的零点,且eqId8dbaf7695bb34084aae15d37cca0817beqId912eadc0a40c4262bbd82d2a8f4409b2,则eqIdf3ccc5889ff44339b4e5a8c578f48e0e(   )
A.eqIda86879ae304449a4a6e6461c485a1f13B.eqId37705e1ef6a84bbdbe88433e75932cdfC.eqIdfca343da1efc413487359c1551da9dbeD.eqIdc052ddfbd4524f67a79e0e77c2e5656a
4. 已知等比数列eqId93e38ecd74a24cb59da79181b95bfd3a满足eqId1c0aa976757c4cf787f6c578868ca693eqId0274440ac30248cb909475474ed969db,则eqIdb2fb132dbd7f4e809993e2923f6724b1(   )
A.eqId37705e1ef6a84bbdbe88433e75932cdfB.eqIdc052ddfbd4524f67a79e0e77c2e5656aC.eqIdddd35c5d043e4ebeac32a99367053c68D.eqId401586f7a7f248b7904a4cfeaa2ed2f0
5. 已知函数eqIde4a0e3706b56447b90fe1b2781f91b14R上的偶函数,且满足eqId18b358aa11364fe8b55491aaba965d64,当eqId2611342bb062465b9c7be2cb2c0b2a6a时,eqId2c4880803c154395976ee8e127d08736,则eqIdb28d2148af264f56a99af6fd2628d50f(   )
A.1B.-1C.-2D.2
6. 若实数eqIda9cd3f94eb8045438f75e9daccfa7200eqId072d7d6b911b42bc89207e72515ebf5f满足约束条件eqId7d9132f07b4245e7ac22240dbd036150,则eqId130920aab4664266ad6a4a22f4e654ba的最小值为(   )
A.9B.0C.-2D.-3
9. 若关于x的方程eqId0cc77f27cbc740a89ed26d6058fa7d39有两个不等实根eqId735b8047beee4dee870fc72ae837a245eqIdecaaaffea9af458c8e6dff16f15c1a73,且eqId42ed9848d4834ac59d8f0386a9eb4ed4eqId9599acf68e8c40a69ad9371b0cc58aac,则实数a的取值范围为(   )
A.eqIdbf792f45ff3c459286fbde824175aa4bB.eqId68f73587123947aba24aeda2e00fec2cC.eqId44236352367d4c3c8c94128ff87b516aD.eqId28ace4570ea84d189b85258609ba6e4a
10. 已知三棱锥eqId3a31af2cac704f7882626fb78089ea14的各条棱均相等,PQ分别为棱eqId6355576c16ff4047a4bdeff7f7b14185eqId0627be51821d4be7b3e024a354815d64的中点,则直线eqId0743582db60f420c9cae978529e721bb和直线eqIdcf2da96900c948a1b3ce7cbfd420c080所成角的大小为(   )
A.30°B.45°C.60°D.90°
11. 已知某三棱锥的三视图如图所示,则该三棱锥的体积为(   )
说明: figure
A.eqId5f51ce9cc7fe4412baeb871cceb26665B.1C.eqIdfc16d8d8e81a417bb6efc8fa1e0583dbD.2