A.whom
B.when
C.what
D.that

A.compared
B.competed
C.reflected
D.compassed

A.Teenagers should not choose energy drinks.
B.Caffeine is bad for people to drink.
C.Red Bull is the best energy drink.
D.It is uncertain whether energy drinks are healthy.

A.to solve
B.extinction
C.its
D.to

A.\(\dfrac{{256\pi }}{3}\)
B.\(\dfrac{{64\pi }}{3}\)
C.\(16\pi \)
D.\(64\pi \)

A.\(y = {x^4} - 2{x^2} - 2\)
B.\(y =  - {x^3} + 2{x^2} - 2\)
C.\(y = {x^3} - 3{x^2} - 2\)
D.\(y =  - {x^4} + 2{x^2} - 2\)

A.\(11\)
B.\(30\)
C.\(6\)
D.\(5\)

A.\(1 + {\log _4}a\)
B.\(4 - {\log _4}a\)
C.\(4 + {\log _4}a\)
D.\(1 - {\log _4}a\)

A.\(2 - 3i\)
B.\( - 2 + 3i\)
C.\( - 2 - 3i\)
D.\(2 + 3i\)

A.\(20\pi \)
B.\(\dfrac{{20\pi }}{3}\)
C.\(10\pi \)
D.\(\dfrac{{10\pi }}{3}\)