高职单招数学精选试题附答案(4)

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14

已知一元二次不等式ax2+bx+1>0的解是<x<,那么()

  • A.<img src="//img1.yqda.net/question-name/b3/d4ef898da85d23ddc0e1f9b603a3cf.png" width="43" height="42"/>
  • B.<img src="//img1.yqda.net/question-name/2f/17667fe8a6325ee022fdc4b3c9c067.png" width="54" height="42"/>
  • C.<img src="//img1.yqda.net/question-name/63/a8ac39e79292cca0cea685900bb24c.png" width="43" height="42"/>
  • D.<img src="//img1.yqda.net/question-name/43/b769f28d241f24bb6bd7fc966a9ed4.png" width="54" height="42"/>
17

拋掷两枚骰子,两次点数之和等于5的概率是()

  • A.<img src="//img1.yqda.net/question-name/cc/8bda490509b16ddc26c3b671403c7f.png" width="22" height="42"/>
  • B.<img src="//img1.yqda.net/question-name/53/67c6f488a00f9e0c7c0c879c0b1f0c.png" width="22" height="42"/>
  • C.<img src="//img1.yqda.net/question-name/17/0dcc9a5bf375d3620af56ba0897ecf.png" width="24" height="42"/>
  • D.<img src="//img1.yqda.net/question-name/44/9e3959500432c335ee178353300530.png" width="23" height="42"/>
21

已知集合,则等于()

  • A.<img src="//img1.yqda.net/question-name/70/015274cee51d07169f9d9580299812.png" width="35" height="42"/>
  • B.<img src="//img1.yqda.net/question-name/46/1ec50cfb6d3d2522e90a72b10a55a1.png" width="28" height="42"/>
  • C.<img src="//img1.yqda.net/question-name/63/58024ddf37518c633ab520245266c8.png" width="47" height="42"/>
  • D.<img src="//img1.yqda.net/question-name/95/25479b6cf9e467e1e6c19d697f9b78.png" width="35" height="42"/>
22

函数在同一直角坐标系内的图像可以是()

  • A.<img src="//img1.yqda.net/question-name/61/2702b298797f011099cfe06c1e2896.png" width="130" height="111"/>
  • B.<img src="//img1.yqda.net/question-name/41/c1fe9076aa812107d3ce781f9b1fcd.png" width="131" height="113"/>
  • C.<img src="//img1.yqda.net/question-name/19/7c4712496766f9707592c1c2e2c2c7.png" width="132" height="113"/>
  • D.<img src="//img1.yqda.net/question-name/bb/b2745e9bd51f2a1f3ee408de88191e.png" width="131" height="114"/>