7.
.已知\(m\),\(n\),\(l\)为不同直线,\(α\),\(β\)为不同平面,给出下列命题,其中真命题的序号是 \((\)填上所有真命题的序号\()\).
\(①\)\(m\)\(/\!/\)\(l\),\(n\)\(/\!/\)\(l\)\(⇒\)\(m\)\(/\!/\)\(n\)\(;②\)\(m\)\(/\!/\)\(α\),\(n\)\(/\!/\)\(α\)\(⇒\)\(m\)\(/\!/\)\(n\)\(;\)
\(③\)\(m\)\(⊥\)\(α\),\(n\)\(⊥\)\(β\),\(α\)\(/\!/\)\(β\)\(⇒\)\(m\)\(/\!/\)\(n\)\(;\)
\(④\)\(m\)\(⊥\)\(α\),\(α\)\(⊥\)\(β\),\(n\)\(⊥\)\(β\)\(⇒\)\(m\)\(⊥\)\(n\)\(;\)
\(⑤\)\(m\)与\(l\)异面,\(n\)与\(l\)异面\(⇒\)\(m\)与\(n\)异面\(;\)
\(⑥\)\(m\)与\(l\)共面,\(n\)与\(l\)共面\(⇒\)\(m\)与\(n\)共面.