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Câu 21:

Cho hai mặt phẳng song song $\left( P \right),\left( Q \right)$

Câu 21: Cho hai mặt phẳng song song (P),(Q)\left( P \right),\left( Q \right)(P),(Q) và đường thẳng Δ\DeltaΔ. Mệnh đề nào sau đây sai?

Thông tin câu hỏi

Câu 21:

Cho hai mặt phẳng song song $\left( P \right),\left( Q \right)$ và đường thẳng $\Delta$ . Mệnh đề nào sau đây sai?