A.Mg.
B.Cu.
C.Zn.
D.Fe.

A.100,4.
B.53,0.
C.100
D.50,2.

A.69,9%.
B.45,65%.
C.53,26%.
D.30,43%.

A.118,7.
B.53,0.
C.33,7.
D.67,4.

A.\(12\)
B.\(11\)
C.\(10\)
D.\(8\)

A.\(C\left( {0; - 1; - 2\sqrt 3 } \right)\)
B.\(C\left( {0; - 1;2\sqrt 3 } \right)\)
C.\(C\left( {1;0; - 2\sqrt 3 } \right)\)
D.\(C\left( { - 1;0;2\sqrt 3 } \right)\)

A.\(a \ge 0\)
B.\(a > 1\)
C.\(a < e\)
D.\(a \ge  - 1\)

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

A.\(8\)
B.\(10\)
C.\(4\)
D.\(3\)

A.\(R = \sqrt {14} \)
B.\(R = 14\)
C.\(R = 4\)
D.\(R = 2\)