2019年春季学期高中数学（入学测试）高中数学（入学测试）
随机作业，答案
一、单选题:【15道,总分:0分】
1.[单选题]<img width="326" height="31" A.a=0,b=0
B.<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">互为倒数</span>
C.<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">互为相反数</span>
正确答案:——A——
2.[单选题]<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">下列函数在定义域上是增函数的是（ ）</span>
A.y=|x|
B.y=x²
C.y=x³
正确答案:——C——
3.[单选题]<img width="404" height="31" A.<img width="125" height="58" B.<img width="166" height="63" C.<img width="109" height="58" 正确答案:——A——
4.[单选题]<img width="509" height="32" A.<img width="31" height="58" B.<img width="27" height="67" C.<img width="59" height="58" 正确答案:————
5.[单选题]<img width="287" height="35" A.<img width="131" height="23" B.<img width="155" height="32" C.<img width="162" height="27" 正确答案:————
6.[单选题]<span style="font-size: 12pt; font-family: 宋体; color: black; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold; mso-bidi-font-size: 10.5pt">下列方程为圆的方程的是（ ）</span>
A.x²+y²=1
B.2x²+y=1
C.2x²-y²=1
正确答案:————
7.[单选题]log₂16=（ ）
A.4
B.3
C.8
正确答案:————
8.[单选题]<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">下列式子中，正确的是（ ）</span>
A.a³+a³=a⁶
B.(a³)²=a⁶
C.a³a²=a⁶
正确答案:————
9.[单选题]<img style="height: 34px; width: 515px" A.1
B.2
C.3
正确答案:————
10.[单选题]<img width="215" height="43" A.3
B.-3
C.<img width="38" height="36" 正确答案:————
11.[单选题]<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">若二次函数y=ax²+2x+1(a≠0)</span><span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">的图像开口向上，则a</span><span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">满足下列哪个条件（ ）</span>
A.a＜0
B.a＞0
C.<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">a取除</span><span lang="EN-US" style="font-size: 10.5pt; font-family: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体">0</span><span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">外的任意实数都行</span>
正确答案:————
12.[单选题]<img width="257" height="32" A.<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">充分条件</span>
B.<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">必要条件</span>
C.<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">充分必要条件</span>
正确答案:————
13.[单选题]<img width="377" height="35" A.<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">单调递增</span>
B.<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">先单调递增，后单调递减</span>
C.<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">单调递减</span>
正确答案:————
14.[单选题]<img width="444" height="34" A.｛1,4｝
B.{2,5,6}
C.{1,2,4,5,6}
正确答案:————
15.[单选题]<img width="440" height="59" A.0
B.1
C.2
正确答案:————
二、判断题:【5道,总分:0分】
1.[判断题]<img width="123" height="55" A.√
B.×
正确答案:——T——
2.[判断题]<img width="83" height="34" A.√
B.×
正确答案:——F——
3.[判断题]<span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">二次函数与一次函数至多有</span><span lang="EN-US" style="font-size: 10.5pt; font-family: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体">2</span><span style="font-size: 10.5pt; font-family: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold">个交点</span><span lang="EN-US" style="font-size: 10.5pt; font-family: "Times New Roman","serif"; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体">.</span>
A.√
B.×
正确答案:——T——
4.[判断题]<img width="205" height="36" A.√
B.×
正确答案:————
5.[判断题]<img width="74" height="36" A.√
B.×
正确答案:————

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