Phương trình $ x+\sqrt{x-2}=\sqrt{2-x}+1 $ có bao nhiêu nghiệm?
A.Có 1 nghiệm
B.Không có nghiệm
C.Có vô số nghiệm
D.Có 2 nghiệm

Giá trị nào sau đây là nghiệm của phương trình $ |2x-1|\,=x+1 $ ?
A.$ x=3 $
B.$ x=1 $
C.$ x=-1 $
D.$ x=2 $

Tìm điều kiện xác định của phương trình $ \sqrt{x-1}+x=\sqrt{x-1}+2 $ .
A. $ 0\le x\le 1 $
B. $ x\ge 1 $
C. $ x < 1 $
D. $ x > 1 $

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
"No, no, you really must stay a bit longer!" said the boys.
A.(1) The boys denied my staying a bit longer.
B.(3) The boys didn’t agree to let stay a bit longer.
C.(4) The boys insisted on my staying a bit longer.
D.(2) The boys refused to let me stay a bit longer.

Mark the letter A, B, C or D to indicate the sentence that is closest in meaning to each of the following questions.
I'm like my mum, whereas my brother looks like my dad
A.I’m like my mum, whereas my brother takes after my dad
B.I’m like my mum, whereas my brother takes to my dad
C.I'm like my mum, whereas my brother takes over my dad
D.I’m like my mum, whereas my brother takes in my dad

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
The hurricane destroyed hundreds of buildings in the city.
A.(2) The hurricane resulted from destruction of hundreds of buildings in the city.
B.(3) Despite the appearance of the hurricane, hundreds of buildings in the city haven’t been in damager of destruction.
C.(4) The hurricane appeared, however, hundreds of buildings in the city have been destroye
D.(1) The hurricane resulted in destruction of hundreds of buildings in the city.

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
WHO means World Health Organization.
A.WHO stands for World Health Organization.
B.WHO is on behalf of World Health Organization.
C.WHO is explained about World Health Organization.
D.WHO is translated from World Health Organization.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
The president placed his car at my disposal as a bonus for my good work.
A.To get rid of the car, the president decided to sell it to me, his good worker, at a bonus price.
B.To show his appreciation for my good work, the president allowed me to use his car whenever I liked.
C.I was willing to drive the president’s car as a compliment for my good performance at work.
D.In order to praise me as a good worker, the president took me home in his own car.

Thể đa bội trên thực tế được gặp chủ yếu ở nhóm sinh vật nào?
A.Thực vật.
B.Động vật, thực vật bậc thấp.
C.Virut.
D.Chỉ gặp ở động vật.

Với $ m $ , $ n > 0 $ , bất đẳng thức: $ mn\left( m+n \right) < { m ^ 3 }+{ n ^ 3 } $ tương đương với bất đẳng thức
 
A.$ \left( m+n \right){{\left( m-n \right)}^ 2 } > 0 $
B.$ \left( m+n \right)\left( { m ^ 2 }+{ n ^ 2 }+mn \right)\ge 0 $
C.$ \left( m+n \right)\left( { m ^ 2 }+{ n ^ 2 } \right)\ge 0 $
D.Tất cả đều sai .