题型:选择题 题类:月考试卷 难易度:中档
测年份:2018
\(a\),\(b\),\(c\)为三条不重合的直线,\(\alpha \),\(\beta \),\(\gamma \)为三个不重合平面,现给出四个命题:
\(①\left. \begin{matrix} & a\parallel \gamma \\ & b\parallel \gamma \\ \end{matrix} \right\}\Rightarrow a\parallel b\);\(②\left. \begin{matrix} & \alpha \parallel c \\ & \beta \parallel c \\ \end{matrix} \right\}\Rightarrow \alpha \parallel \beta \);\(③\left. \begin{matrix} & \alpha \parallel \gamma \\ & \beta \parallel \gamma \\ \end{matrix} \right\}\Rightarrow \alpha \parallel \beta \);\(④\left. \begin{matrix} & \alpha \parallel c \\ & a\parallel c \\ \end{matrix} \right\}\Rightarrow \alpha \parallel a.\)其中正确的是\((\) \()\).