A.Đánh du kích, phục kích.
B.Đánh tập trung quy mô lớn.
C.Đánh điểm, diệt viện.
D.Đánh công sự kiên cố.

A.\(0 < x < 1\) hoặc \(x > 2\)
B.\(x < 2\)
C.\(0 < x < 1\)
D.\(0 < x < 2\)

A.\(S = \left\{ {\left( { - 3; - 1} \right),\left( { - \frac{3}{2}; - \frac{5}{2}} \right);\left( { - 6; - 2} \right)} \right\}\).
B.\(S = \left\{ {\left( { - 3; - 1} \right),\left( { - 6; - 2} \right)} \right\}\).
C.\(S = \left\{ {\left( { - 3; - 1} \right),\left( { - \frac{3}{2}; - \frac{5}{2}} \right)} \right\}\).
D.\(S = \left\{ {\left( { - \frac{3}{2}; - \frac{5}{2}} \right);\left( { - 6; - 2} \right)} \right\}\).

A.\(m =  1\)
B.\(m =  2\)
C.\(m =  - 2\)
D.\(m =  - 1\)

A.\(x \in \left\{ {-\frac{1}{2};1;2;2 - \sqrt 3 ;2 + \sqrt 3 } \right\}\)
B.\(x \in \left\{ {\frac{1}{2};2;2 - \sqrt 3 ;2 + \sqrt 3 } \right\}\)
C.\(x \in \left\{ {\frac{1}{2};1;2 - \sqrt 3 ;2 + \sqrt 3 } \right\}\)
D.\(x \in \left\{ {\frac{1}{2};1;2;2 - \sqrt 3 ;2 + \sqrt 3 } \right\}\)

A.\(x \in \left\{ {-\frac{1}{2};1;2;2 - \sqrt 3 ;2 + \sqrt 3 } \right\}\)
B.\(x \in \left\{ {\frac{1}{2};2;2 - \sqrt 3 ;2 + \sqrt 3 } \right\}\)
C.\(x \in \left\{ {\frac{1}{2};1;2 - \sqrt 3 ;2 + \sqrt 3 } \right\}\)
D.\(x \in \left\{ {\frac{1}{2};1;2;2 - \sqrt 3 ;2 + \sqrt 3 } \right\}\)

A.\(a \in \left\{ {2020;5300} \right\}\)
B.\(a \in \left\{ {2020;8580} \right\}\)
C.\(a \in \left\{ {5300;8580} \right\}\)
D.\(a \in \left\{ {2020} \right\}\)

A.
B.
C.
D.

A.
B.
C.
D.

A.
B.
C.
D.