2017年天津市中考数学试卷

2

$-2$

8

$-8$

$\sqrt{3}$

1

$\frac{\sqrt{2}}{2}$

$\frac{1}{2}$

$0.1263\times {10}^8$

$1.263\times {10}^7$

$12.63\times {10}^6$

$126.3\times {10}^5$

4和5之间

5和6之间

6和7之间

7和8之间

1

$a$

$a+1$

$\frac{1}{a+1}$

$\left\{\begin{array}{c}x=2\\ y=3\end{array}\right.$

$\left\{\begin{array}{c}x=4\\ y=3\end{array}\right.$

$\left\{\begin{array}{c}x=4\\ y=8\end{array}\right.$

$\left\{\begin{array}{c}x=3\\ y=6\end{array}\right.$

$\angle \mathit{ABD}=\angle E$

$\angle \mathit{CBE}=\angle C$

$\mathit{AD}//\mathit{BC}$

$\mathit{AD}=\mathit{BC}$

$y_1<y_2<y_3$

$y_2<y_3<y_1$

$y_3<y_2<y_1$

$y_2<y_1<y_3$

$\mathit{BC}$

$\mathit{CE}$

$\mathit{AD}$

$\mathit{AC}$

$y=x^2+2x+1$

$y=x^2+2x-1$

$y=x^2-2x+1$

$y=x^2-2x-1$