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"This hole helps prevent moisture and snow from accumulating on the windows," said Bret Jensen, a senior Boeing aeronaual technician. That's why your windows don't get cloudy every time the plane passes through the clouds."
nghĩa :
Bret Jensen, kỹ thuật viên hàng không cao cấp của Boeing cho biết: “Lỗ thủng này giúp ngăn hơi ẩm và tuyết tích tụ trên cửa sổ. Đó là lý do tại sao cửa sổ của bạn không bị vẩn đục mỗi khi máy bay đi qua các đám mây ”.
Holes in window panes are meant to keep us safe. Known as “bleed holes”, they help regulate air pressure changes as planes climb to cruising altitudes of up to 33,000 feet. At high altitudes, air pressure and oxygen levels reduce. ... However, this pressure difference puts enormous strain on the windows.
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Question 10. Fiber in some kinds of food is necessary for the digestive system to work normally. We need to eat enough food rich in fiber. The kinds of food rich in fiber are ……10 điểm
A. rice and corn.
B. eggs and milk.
C. fruits and vegetables.
D. meat and fish.
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Question 10. Why don’t we burn plas trash?10 điểm
A. Because we do not have enough fuel.
B. Because plas is non-flammable.
C. Because plas is not harmful to the environment.
D. Because burning plas releases harmful smoke.
Question 10. Why don’t we burn plas trash?10 điểm A. Because we do not have enough fuel. B. Because plas is non-flammable. C. Because plas is not harmful to the environment. d. Because burning plas releases harmful smoke.
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Question 9. “Calcium is a ... (1) ... which helps you to grow strong ... (2) .... Calcium can be found in ... (3) ....”. The appropriate words to fill in the blanks (1), (2), (3) respectively are 10 điểm
A. protein, bones, meat
B. protein, heart, milk
C. mineral, heart, meat
D. mineral, bones, milk
Question 9. “Calcium is a ... (1) ... which helps you to grow strong ... (2) .... Calcium can be found in ... (3) ....”. The appropriate words to fill in the blanks (1), (2), (3) respectively are 10 điểm
A. protein, bones, meat
B. protein, heart, milk
C. mineral, heart, meat
D. mineral, bones, milk
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Question 7. What are the alloys of iron?10 điểm
A. Aluminum and copper
B. Cast iron and steel
C. Lead and aluminum
D. Steel and copper
@Mr. Trí
Lactose intolerance is usually the result of your body not producing enough lactase. Lactase is an enzyme (a protein that causes a chemical reaction to occur) normally produced in your small intestine that's used to digest lactose. If you have a lactase deficiency, it means your body does not produce enough lactase.
là gì ko hiểu