A.4
B.3
C.2
D.1

A.25,83.
B.4,77.
C.13,57.
D.8,8.

A.138
B.182
C.154
D.134

A.122,00.
B.360,80.
C.456,75.
D.121,80.

A.30,5.
B.32,2.
C.33,3.
D.31,1.

A.25%.
B.50%.
C.75%.
D.20%.

A.8%.
B.10%.
C.9%.
D.11%.

A.Al.
B.Al2O3.
C.Al(OH)3.
D.AlCl3.

A.Etilen (CH2=CH2).
B.Ancol etylic (CH3CH2OH).
C.Etyl axetat (CH3COOC2H5).
D.Metylamin (CH3NH2).

A.\(\left\{ \begin{array}{l}x =  - \dfrac{1}{3}\\y =  - \dfrac{7}{3} + t\\z = \dfrac{{10}}{3}\end{array} \right.\)
B.\(\left\{ \begin{array}{l}x =  - \dfrac{1}{7}t\\y = 1 - \dfrac{7}{3}t\\z = \dfrac{{10}}{3}t\end{array} \right.\)
C.\(\left\{ \begin{array}{l}x = \dfrac{3}{7}t\\y = 1 - \dfrac{{25}}{7}t\\z = \dfrac{{18}}{7}t\end{array} \right.\)
D.\(\left\{ \begin{array}{l}x = \dfrac{3}{7}\\y =  - \dfrac{{25}}{7} + t\\z = \dfrac{{18}}{7}\end{array} \right.\)