Cho tam giác ABC có các đường phân giác trong của góc B và góc C cắt nhau tại O. Nếu $ \widehat{BOC}={{135}^{o}} $ thì khẳng định nào sau đây là đúng ?
A. $ \Delta ABC $ cân tại A.
B. $ \Delta ABC $ là tam giác đều.
C. $ \Delta ABC $ vuông cân tại A.
D. $ \Delta ABC $ vuông tại A.

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in position of primary stress in the following question.
A.concern
B.problem
C.reason
D.happen

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in position of primary stress in the following question.
A.capture
B.pleasure
C.ensure
D.picture

Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.
A.devote
B.postpone
C.realize
D.decide

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.
A.maintain
B.entire
C.retain
D.fountain

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in position of primary stress in the following question.
A.dangerous
B.endanger
C.deafening
D.danger

Cho tam giác ABC có $ \widehat{A}={{120}^{o}} $ có các đường phân giác AD, BE, CF (hình vẽ):
Cho biết $ DE=8\,cm\,;\,DF=6\,cm. $ Khi đó độ dài EF là:
A.14cm.
B.12cm.
C.10cm.
D.8cm.

Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.
A.expensive
B.symbolic
C.confident
D.disastrous

Choose the word that has the stress differently from that of the other words
A.profit
B.suggest
C.surrender
D.report

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in position of primary stress in the following question.
A.forgive
B.forget
C.formal
D.informal