A.describing a process
B.providing historical background
C.explaining a theory
D.classifying types of worksheets

A.satisfactory
B.suitable
C.perfect
D.creative

A.pencil and paper allow people to relax their minds when they make a decision
B.there is only one suitable solution to each problem
C.college students can use a worksheet to seek a job after graduation
D.human mental capacity has limitations

A.problem
B.decision
C.worksheet
D.distinction

A.risk
B.threat
C.danger
D.harm

A.Poli(metyl metacrylat) có tính đàn hồi.
B.Cao su buna-S được hình thành khi đồng trùng hợp buta-1,3- đien với lưu huỳnh.
C.Poliacrilonitrin thuộc loại tơ vinylic.
D.Tơ visco là polime tổng hợp.

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

A.\(6\)
B.\(5\)
C.\(8\)
D.\(3\)

A.\( - \dfrac{1}{2}\sin \left( {2x + 3} \right) + C\)
B.\(\sin \left( {2x + 3} \right) + C\)
C.\(\dfrac{1}{2}\sin \left( {2x + 3} \right) + C\)
D.\( - \sin \left( {2x + 3} \right) + C\)

A.\(3\sqrt 2 \)
B.\(\dfrac{{11\sqrt 2 }}{2}\)
C.\( - \dfrac{{\sqrt 2 }}{2}\)
D.\(\sqrt 2 \)