- A.不等于-<img alt="" src="//img1.yqda.net/question-name/b4/272faa06e5f52d511d0e290e944275.gif" />的全体实数
- B.全体实数集
- C.空集
- D.x≠<img alt="" src="//img1.yqda.net/question-name/2f/55b4b9467d32aafba4c177114e22c5.gif" />的一切实数
- A.(x-3)2+(y+1)2=4
- B.(x+3)2+(y-1)2=4
- C.(x-1)2+(y-1)2=4
- D.(x+1)2+(y+1)2=4
- A.x3+7x2+22x+23
- B.x3—7x2+22x+23
- C.x3+7x2—22x+23
- D.x3—7x2—22x+23
- 13
-
( )
- 14
-
( )
- A.x=1
- B.x=2
- C.x=3
- D.x=4
- A.(-∞,-3),(-3,1),(1,+∞)
- B.(-∞,-1),(-1,3),(3,+∞)
- C.(-∞,-3),(-3,-1),(-1,+∞)
- D.(-∞,1),(1,3),(3,+∞)
- 16
-
( )
- A.2
- B.1og<sub>3</sub>39
- C.1
- D.1og<sub>3</sub>15
- A.{x|-4≤z≤-2)
- B.{x|x≤-2}
- C.{x| 2≤x≤4)
- D.{x|x≤4)
- 18
-
函数y=
的定义域是( )
- A.<img alt="" src="//img1.yqda.net/question-name/95/cde7691fc5efabbf577a9c598827b8.gif" />
- B.<img alt="" src="//img1.yqda.net/question-name/c9/ff9192bdc0ef7f8a27abe88e2d87ad.gif" />
- C.<img alt="" src="//img1.yqda.net/question-name/5f/b6f7d91439714eb3180f87da942cdf.gif" />
- D.<img alt="" src="//img1.yqda.net/question-name/f4/b9a58b3cc1a6c470907f01ebe70ea2.gif" />
- A.y-3x+2=0
- B.y-32-2=0
- C.3y+x+6=O
- D.3y+x-6=0
- A.<img alt="" src="//img1.yqda.net/question-name/14/4fb9f71fab8e7733bdb982eb642747.gif" />
- B.±<img alt="" src="//img1.yqda.net/question-name/1c/8b80d9cc526ff6ffa963b17a6430bc.gif" />
- C.±<img alt="" src="//img1.yqda.net/question-name/8d/8792a92f995e7a034843320273bccd.gif" />
- D.<img alt="" src="//img1.yqda.net/question-name/09/e15cb750872f43044073d0f070b36e.gif" />
- 21
-
已知角α=2,则 ( )
- A.sinα>0,COSα>0
- B.sinα<0,COSα>0
- C.sinα>0,COSα<0
- D.sina<0,COSα<0
- A.128
- B.76
- C.<img alt="" src="//img1.yqda.net/question-name/5f/1a75a75f90d9530a8206dd3a27509e.gif" />
- D.<img alt="" src="//img1.yqda.net/question-name/f1/c315d5cdcc5cd48b7bc4cc99abdade.gif" />
- A.21种
- B.24种
- C.27种
- D.63种
- A.4个
- B.5个
- C.6个
- D.7个