A.\(3\)
B.\(2\)
C.\(7\)
D.\(4\)

A.\(\dfrac{{2\pi  + 5\sqrt 3 }}{3}\)
B.\(\dfrac{{4\pi  + 5\sqrt 3 }}{3}\)
C.\(\dfrac{{4\pi  + \sqrt 3 }}{3}\)
D.\(\dfrac{{2\pi  + \sqrt 3 }}{3}\)

A.\(\dfrac{1}{2}\)
B.\(2\)
C.\(\dfrac{7}{2}\)
D.

A.\(2\)
B.\(1\)
C.\(3\)
D.\(4\)

A.\(\left\{ \begin{array}{l}x = \dfrac{{19}}{5} + 2t\\y =  - \dfrac{2}{5} - t\\z = t\end{array} \right.\)
B.\(\left\{ \begin{array}{l}x = \dfrac{{19}}{5} + 2t\\y =  - \dfrac{{12}}{5} - t\\z = 1 + t\end{array} \right.\)
C.\(\left\{ \begin{array}{l}x = \dfrac{3}{5} + 2t\\y =  - \dfrac{4}{5} - t\\z = 2 + t\end{array} \right.\)
D.\(\left\{ \begin{array}{l}x = \dfrac{1}{5} + 2t\\y =  - \dfrac{2}{5} - t\\z = 1 + t\end{array} \right.\)

A.\(9\sqrt {26} \pi \) \(\left( {c{m^3}} \right)\)
B.\(\dfrac{{9\sqrt {26} \pi }}{2}\) \(\left( {c{m^3}} \right)\)
C.\(\dfrac{{9\sqrt {26} \pi }}{5}\) \(\left( {c{m^3}} \right)\)
D.\(\dfrac{{9\sqrt {26} \pi }}{{10}}\) \(\left( {c{m^3}} \right)\)

A.\(\dfrac{{{a^3}\sqrt 3 }}{6}\)
B.\(\dfrac{{{a^3}\sqrt 3 }}{4}\)
C.\(\dfrac{{{a^3}\sqrt 3 }}{{15}}\)
D.\(\dfrac{{{a^3}\sqrt 3 }}{{12}}\)

A.\(\dfrac{{\sqrt 2 }}{2}\)
B.\(\sqrt 5 \)
C.\(\dfrac{{\sqrt {17} }}{2}\)
D.\(\dfrac{1}{2}\)

A.\(S = 515\)
B.\(S = 164\)
C.\(S = 436\)
D.\(S =  - 9\)

A.\(3\)
B.\(2\)
C.\(1\)
D.\(4\)