A.axit etanoic.
B.axit propionic.
C.axit oxalic.
D.axit metanoic.

A.C2H5OH.
B.OHC-CHO.
C.CH3CHO.
D.HCHO.

A.3
B.4
C.5
D.6

A.13,0.
B.1,0.
C.1,2.
D.12,8.

A.turn round
B.dip into
C.get through
D.go into

A.\(\left( { - 2;0} \right)\)
B.\(\left( { - \infty ; - 1} \right)\) và \(\left( {0;1} \right)\)
C.\(\left( { - 1;1} \right)\)
D.\(\left( {2; + \infty } \right)\)

A.\(\dfrac{3}{2}\)
B.\( - \dfrac{3}{2}\)
C.\( - \dfrac{2}{3}\)
D.\(\dfrac{2}{3}\)

A.\(\dfrac{2}{3}\)
B.\(\dfrac{3}{2}\)
C.\(\dfrac{1}{3}\)
D.\(\dfrac{7}{3}\)

A.\(16\pi \)
B.\(8\pi \)
C.\(12\pi \)
D.\(32\pi \)

A.\( - 25\)
B.\( - 6\)
C.\( - 48\)
D.\(3\)