Viết các phân số theo thứ tự từ bé đến lớn: $\frac{14}{15}; \frac{23}{30}; \frac{9}{10}; \frac{3}{5}; \frac{7}{40}; \frac{2}{25}$

Cho tam giac ABC,can tai A,Tren canh AB,AC,lan luot lay cac diem K,H sao cho AK=AH.Goi O la giao diem bh va CK.Chung minh tam giac OBC can.

Tiến hành thí nghiệm trên ếch đã hủy não:

- Thí nghiệm 1: Kích thích bằng dung dịch HCl 3% chi trước bên phải

- Điều kiện thí nghiệm 1: Rễ sau của chi sau bên phải và rễ trước của chi trước bên phải bị đứt

- Thí nghiệm 2: Kích thích bằng dung dịch HCl 3% chi sau bên trái

- Điều kiện thí nghiệm 2: Cắt ngang tủy (ở đôi dây thần kinh da giữa lưng 1 và 2)

Xác định và giải thích kết quả của thí nghiệm trên.

Question 64. Few scientific breakthroughs are discovered merely by (coincidence) tìm từ đồng nghĩa
A. talent
B. laymen
C. chance
D. imagination

Question 65. Fathers are being encouraged to hold their new­borns ..............develop a close relationship
A. therefore
B. thus
C. in order to
D. in addition

Question 59. If interest rates are cut, the economic situation may improve.
A. There is no doubt that the economic situation will improve as a result of the reduction in interest
rates.
B. The economic situation won’t be better if interest rates are cut.
C. A reduction of interest rates may improve the economic situation.
D. The economic situation may improve if we increase the interest rates.

Question 66. By measuring changing conditions in the atmosphere ..............general weather patterns
A. meteorologists who are predicting

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B. meteorologists were predicted C. predicting meteorologists
D. meteorologists can predict

Question 67. Some countries require tourists to receive certain vaccinations before entry, while others
do not
A. vaccinations are given to tourists at the border by some countries, but not by all
B. tourists need not be vaccinated to enter certain countries, but other nations may demand this
C. many countries vaccinate tourists after they have entered, whereas many others don’t
D. while many tourists get vaccinated upon entry to some countries, man others do not

Question 68. Though I had known about it well in advance, I pretended to be surprised at having a
birthday party
A. I acted surprised about being given a birthday party, but I had known about it a long time before
B. Despite only pretending to be surprised at the birthday party, I had actually been completely unaware
of it
C. I was quite surprised at their throwing me a birthday party, though I could have found out about it
well before
D. I knew about the birthday party a long time before, yet I wasn’t pretending when I acted surprised

Question 69. I need to get some cash. Do you think we might pass a bank___________?

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A. in the way
B. to the way
C. on the way : dọc đường
D. at the way

Question 70. Her only income being a small allowance, she lived a very ___________life
A. frugal
B. mean
C. sparing : thanh đạm (sơ sài)
D. extravagant : phung phí, hoang phí

Question 47 : ................drivers endanger their lives and those of other road users.
A. Drunk
B. Drunken (adj) : say
C. Drinking
D. Drunkard

Question 47 : ................drivers endanger their lives and those of other road users.
A. Drunk
B. Drunken (adj) : say
C. Drinking
D. Drunkard