- A.2,<img src="//img1.yqda.net/question-name/ca/f6e157b2234c64d6a79755d220a4a4.png" width="16" height="42"/>
- B.2,<img src="//img1.yqda.net/question-name/52/b5e29874a1f943e1860c9ef21572c8.png" width="27" height="42"/>
- C.-2,<img src="//img1.yqda.net/question-name/9a/bdff89b8d22d23b0975286b653a7c2.png" width="16" height="42"/>
- D.-2,<img src="//img1.yqda.net/question-name/88/2874f89ae509c03970546e304494f8.png" width="27" height="42"/>
- A.<img src="//img1.yqda.net/question-name/5a/a5a38d1836618cd07b0db1c10bba6f.png" width="52" height="42"/>
- B.<img src="//img1.yqda.net/question-name/6b/71e7cddb0e3d85cb57a58a63ab3bd4.png" width="71" height="26"/>
- C.4,8,12
- D.<img src="//img1.yqda.net/question-name/f3/f4aeb1a961424048ffca14313e3dae.png" width="83" height="22"/>
- A.(7,3)
- B.(-7,-3)
- C.(-7,3)
- D.(7,-3)
- 16
-
设集合
,
,则()
- A.A,B的都是有限集
- B.A,B的都是无限集
- C.A是有限集,B是无限集
- D.B是有限集,A是无限集
- A.1
- B.-1
- C.2
- D.-2
- A.<img src="//img1.yqda.net/question-name/16/c6864297a0a595ec280a7bfc5f8573.png" width="15" height="42"/>
- B.<img src="//img1.yqda.net/question-name/2c/f49e10035ff50ec76ab7d21eb95b4a.png" width="16" height="42"/>
- C.<img src="//img1.yqda.net/question-name/3a/c1a489c0aee78860da8fa9df09f3b3.png" width="16" height="42"/>
- D.<img src="//img1.yqda.net/question-name/d3/1ecb6d0d2c891bae9e5f2ebaecb7ba.png"/>
- A.20
- B.40
- C.60
- D.80
- A.a≥6
- B.a≤6
- C.a>6
- D.-8
- A.l
- B.2
- C.3
- D.4
- A.充分条件
- B.必要条件
- C.充要条件
- D.既不充分也不必要条件