Cho A = {0;2;3;4}, B = {3;4;5} a, Hãy xác đinh tất cả các tập con khác rỗng X, Y của A biết rằng: X ∪ Y = A và (A ∩ B) ⊂ X b, Hãy xác định tất cả tập D biết rằng (A ∩ B) ⊂ D ⊂ (A ∪ B)

Pic một vẽ đậu mần đang gắm 1 con đom đóm cute Píc 2 vẽ một con đom đóm siêu cute (Lưu ý: Không chép mạng , có chữ kí , full màu, vẽ có tâm nhoa , có thêm chữ kí ! ) Nếu có thể vẽ jack cute ko thì thôi! Nếu có jack thì được hay nhất (Cho 60 điểm)

1 gen có 1656 liên kết H và gen này có phiên mã tổng hợp 1 ARN , có tỉ lệ các Nu: A : U : G : X = 4 3 2 1 Giải hộ ạ =(((

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Vẽ trái Ope ope cua Gia Cát Law đi ạ

The local government is....the causes of coronavirus transmission in the area A looking up B looking out C looking after Đ looking into

C. packed with your passport D. painted a bright colour Question 26.The underlined word ‘it’ refers to your ___________. A. identification B. luggage C. passport D. flight Question 27.It can be inferred from the passage that ___________. A. travelling may cost more in peak season B. you must always take cash with you C. larger lunches cost more than smaller ones D. you can’t get back your lost luggage overseas Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 28 to 32. Pollution We are slowly (28)________ the earth. The seas and rivers are too dirty to swim in. There is so much smoke in the air that is unhealthy to live in many of the world’s cities. In one well-known city, for example, (29)________ gases from cars pollute the air so much that traffic policeman have to wear oxygen marks. We have cut (30)________ so many trees that are now vast areas of wasteland all over the world. As a result, farmers in some parts of America can’t grow enough to eat. In certain countries in Asia, there is too little rice. (31)________, we do not take enough care of the countryside. Wild animals are quickly disappearing. For distance, tigers are rare in India now because we have killed too many for them to survive. We must act now before it is too (32)________ to do anything. Join us now. Save the earth. It is too important to ignore. Question 28: A. destroying B. destroy C. to destroy D. destroyed Question 29: A. poisoned B. poison C. poisonously D. poisonous Question 30: A. off B. into C. up D. down Question 31: A. Moreover B. Despite C. Although D. Because Question 32: A. later B. latest C. lately D. late

Cho tam giác ABC có độ dài 3 cạnh là a$\leq$ b$\leq$ c . CMR : $(a+b+c)^{2}$ $\leq$ 9bc

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