下列说法正确的是( )
A.命题“若![]() ![]() ![]() ![]() |
B.设![]() ![]() ![]() ![]() |
C.若![]() |
D.命题“![]() ![]() ![]() ![]() |
更新时间:2021-02-17 10:31:32
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【推荐1】下列命题中,不正确的有( )
A.对角线垂直的四边形是菱形 |
B.若![]() ![]() |
C.若两个三角形相似,则它们的面积之比等于周长之比 |
D.若![]() ![]() |
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【推荐2】下列说法正确的有( )
A.命题“![]() ![]() |
B.若命题“![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.“![]() ![]() |
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【推荐1】下列有关命题的说法正确的是( )
A.命题“同位角相等,两直线平行”的逆否命题为:“两直线不平行,同位角不相等” |
B.“若实数x,y满足![]() |
C.命题“![]() ![]() |
D.对于命题P:![]() ![]() ![]() ![]() ![]() |
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【推荐2】下列命题中其中真命题为( )
A.“等边三角形三内角都为![]() |
B.“若![]() ![]() |
C.“全等三角形的面积相等”的否命题; |
D.“若![]() ![]() |
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【推荐1】已知命题p:若
为钝角三角形,则
;命题q:若
,则
,则下列命题为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48675d86e35b583c613d26223553fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25025b3bc789a7c763635dfedea8658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb509318ae4ed3eaa5197c142115b34.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知命题p:若双曲线C:
的实轴长大于虚轴长,则
;命题q:
,
,
是三个不同的向量,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
.则下列命题中为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea0399de4659dca7ca95ae7eda823ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78a2c56b1da1b718583ff03d3c35174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】下列命题中为真命题的是( )
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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【推荐2】下列有关命题的说法中正确的是( )
A.若![]() ![]() |
B.命题:"若![]() ![]() |
C.命题"![]() ![]() ![]() ![]() |
D.若直线![]() ![]() ![]() ![]() ![]() |
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