Read the following passage and mark the letter A, B, C, D on your answer sheet to indicate the correct answer to each of the questions

          According to airline industry statistics, almost 90% of airline accidents are survivable or partially survivable. But passengers can increase their chances of survival by learning and following certain tips. Experts say that you should read and listen to safety instructions before take-off and ask questions if you have uncertainties. You should fasten your seat belt low on your hips and as tightly as possible. Of course, you should also know how the release mechanism of your belt operates. During take-offs and landings, you are advised to keep your feed flat on the floor. Before take-off you should locate the nearest exit and an alternative exit and count the rows of seats between you and the exits so that you can find them in the dark if necessary

          In the event that you are forewarned of a possible accident, you should put your hands on your ankles and keep your head down until the plane comes to a complete stop. If smoke is present in the cabin, you should keep your head low and cover your face with napkin, towels or clothing. If possible, wet these for added protection against smoke inhalation. To evacuate as quickly as possible, follow crew commands and do not take personal belongings with you. Do not jump on escape slides before they’re fully inflated, and when you jump, do so with your arms and legs extended in front of you. When you get to the ground, you should move away from the plane as quickly as possible, and never smoke near the wreckage

The word “evacuate” in the second paragraph is closest in meaning to ____

A. evade

B. vacate 

C. escape 

D. maintain

X và Y là hai axit cacboxylic đơn chức (trong đó có một axit có một liên kết đôi C=C, M_X < M_Y), Z là este đơn chức, T là este 2 chức (các chất đều mạch hở, phân tử không có nhóm chức nào khác, không có khả năng tráng bạc). Cho 38,5 gam hỗn hợp E gồm X, Y, Z, T tác dụng vừa đủ với 470 ml dung dịch NaOH 1M được m gam hỗn hợp 2 muối và 13,9 gam hỗn hợp 2 ancol no, mạch hở có cùng số nguyên tử C trong phân tử. Đốt cháy hoàn toàn m gam hỗn hợp muối cần vừa đủ 27,776 lít O₂ thu được Na₂CO₃ và 56,91 gam hỗn hợp gồm CO₂ và H₂O. Phần trăm theo khối lượng của T trong E gần nhất với giá trị nào sau đây?  

A. 41

B. 66.   

C. 26.   

D. 61.  

Read the following passage and mark the letter A, B, C, D on your answer sheet to indicate the correct answer to each of the questions

          According to airline industry statistics, almost 90% of airline accidents are survivable or partially survivable. But passengers can increase their chances of survival by learning and following certain tips. Experts say that you should read and listen to safety instructions before take-off and ask questions if you have uncertainties. You should fasten your seat belt low on your hips and as tightly as possible. Of course, you should also know how the release mechanism of your belt operates. During take-offs and landings, you are advised to keep your feed flat on the floor. Before take-off you should locate the nearest exit and an alternative exit and count the rows of seats between you and the exits so that you can find them in the dark if necessary

          In the event that you are forewarned of a possible accident, you should put your hands on your ankles and keep your head down until the plane comes to a complete stop. If smoke is present in the cabin, you should keep your head low and cover your face with napkin, towels or clothing. If possible, wet these for added protection against smoke inhalation. To evacuate as quickly as possible, follow crew commands and do not take personal belongings with you. Do not jump on escape slides before they’re fully inflated, and when you jump, do so with your arms and legs extended in front of you. When you get to the ground, you should move away from the plane as quickly as possible, and never smoke near the wreckage

The word “them” in the last line of the first paragraph refers to ___

A. rows

B. feet

C. seats

D. exits

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to the following question.

I didn’t know you were coming, so I didn’t wait for you.

A. If I had known you were coming, I wouldn’t have waited for you.

B. I would have waited for you if I knew you were coming.

C. If I had know you were coming, I would wait for you.

D. Had I known you were coming, I would have waited for you.

Thủy phân hoàn toàn m gam chất béo trong dung dịch NaOH dư thu được 9,12 gam muối và 0,92 gam glixerol. Giá trị của m là

A. 8,84.

B. 9,64.

C. 10,04.

D. 10,44.

Peptit X có công thức Pro-Pro-Gly-Arg-Phe-Ser-Phe-Pro. Khi thuỷ phân không hoàn toàn X thu được tối đa bao nhiêu loại peptit có amino axit đầu N là phenylalanin (Phe)?

A. 3

B. 5

C. 6

D. 4