Trong không gian cho hai đường thẳng \(a,\,\,b\) phân biệt và mặt phẳng \(\left( \alpha \right)\). Mệnh đề nào sau đây sai?
A.\(\left\{ \begin{array}{l}a \not\subset \left( \alpha \right)\\a//b\\b \subset \left( \alpha \right)\end{array} \right. \Rightarrow a//\left( \alpha \right)\)
B.\(\left\{ \begin{array}{l}a \cap \left( \alpha \right) = K\\b \cap \left( \alpha \right) = K\end{array} \right. \Rightarrow a \cap b = K\)
C.\(\left\{ \begin{array}{l}a//b\\b//\left( \alpha \right)\end{array} \right. \Rightarrow a//\left( \alpha \right)\)
D.\(\left\{ \begin{array}{l}a//b\\a \cap \left( \alpha \right) = M\end{array} \right. \Rightarrow b \cap \left( \alpha \right) = N\)
A.\(\left\{ \begin{array}{l}a \not\subset \left( \alpha \right)\\a//b\\b \subset \left( \alpha \right)\end{array} \right. \Rightarrow a//\left( \alpha \right)\)
B.\(\left\{ \begin{array}{l}a \cap \left( \alpha \right) = K\\b \cap \left( \alpha \right) = K\end{array} \right. \Rightarrow a \cap b = K\)
C.\(\left\{ \begin{array}{l}a//b\\b//\left( \alpha \right)\end{array} \right. \Rightarrow a//\left( \alpha \right)\)
D.\(\left\{ \begin{array}{l}a//b\\a \cap \left( \alpha \right) = M\end{array} \right. \Rightarrow b \cap \left( \alpha \right) = N\)
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