Đáp án:
D
Giải thích các bước giải:
a b
C=C
c d
có đồng phân hình học khi a khác c và b khác d
Chọn D
Khi $a \neq b$ và $c \neq d$ (a, b cùng gắn vào 1C ko no; c, d cùng gắn vào 1C ko no) thì có đồng phân hình học
làm giúp em phần b bài này vs ạ Em cảm ơn ạ
1.Bài tập xác định trình tự các Nu trong mạch đơn của phân tử ADN Trong một mạch đơn của phân tử ADN có trình tự các Nu như sau,GGX-TAT-XXT-GGA-AAX-XAG... Xác định trình tự các Nu trong mạch bổ sung của phân tử ADN.
Kể tên những vở kịch em đã được học và đọc thêm trong chương trình Ngữ văn THCS
Tính độ dài cạnh của hình vuông, biết độ dài đường chéo là 2 cm
giúp mk nha, mik đg cần gấp Câu 1: Thực hiện phép tính: a, 134*23+134*17-40*34 b, 315-6*[(-4^2-12)^2+2019^0] c, (5*2^3-2*3^2):11+2018-/-2018/ Câu 2: Tìm x, biết: a, (2x-8)*5=2*5^3 b,(x+2)^3-26=(4^3-3^2*7)^100
36. The people watched the game. None of them will ever forget it. A. Nobody who watched the game will forget it. B. None of the people that watched the game will ever forget it. C. Nobody that watched the game will ever forget it. D. The people watched the game none of whom will ever forget it. 37. When I was a young girl, chocolate was one of my favourites. A. When very young, I like eating chocolate cakes. B. Being a little girl, I like chocolate. C. Chocolate used to be a favorite of mine when I was a young girl. D. My favourite was chocolate as was a little girl. 38. Even though it was raining heavily, the explorers decided to continue their journey. A. If it had rained heavily, the explorers would not have continued their journey. B. The heavy rain could not prevent the explorers from continuing their journey. C. It rained so heavily that the explorers could not continue their journey. D. The explorers put off their journey due to the heavy rain. 39. This year will be difficult for this organization because ______. A. it has less money and fewer volunteers than it had last year B. they have less money and volunteers than they had last year C. the last year it did not have as few and little volunteers and money D. there are fewer money and volunteers that in the last year there were 40. The girl just said hello. She is Tom's youngest sister. A. The girl saying hello is Tom's youngest sister. B. The girl just said hello is Tom's youngest sister. C. The girl, who just said hello, is Tom's youngest sister. D. The girl who just said hello is Tom's youngest sister.
You are not allowed to drive without your driving license Viết lại câu trên theo nghĩa k đổi
Viết đoạn văn khoảng 10 câu theo kiểu diễn dịch phân tích hiệu quả của phép đối ở hai câu thơ sau trong bài Ngắm trăng. Các bạn giúp mình với không chép mạng nha mình đang cần gấp ạ Cám ơn các bạn nhiều ạ!
Giải dùm mình vs ạ Mình thank you so much
Vietnamese food culture varies by regions from the North to the South. In Northern Vietnam, food is characterized by light and balanced. Northern Vietnam is seen to be the cradle of Vietnamese cuisine with many notable dishes like Pho, Bun Rieu, Bun Thang, Bun Cha, Banh Cuon, etc. Then, food culture in Northern Vietnam became popular in Central and Southern Vietnam with suitable flavors in each regions. The regional cuisine of Central Vietnam is famous for its spicy food. Hue cuisine is typical Central Vietnam’s food culture. Food in the region is often used with chili peppers and shrimp sauces, namely, Bun Bo Hue, BanhKhoai, BanhBeo, etc. In Southern Vietnam, the warm weather and fertile soil create an ideal condition for planting a variety of fruit, vegetables and livestock. Thus, food in the region is often added with garlic, shallots and fresh herbs. Particularly, Southerners are favored of sugar; they add sugar in almost dishes. Some signature dishes from Southern Vietnam include BanhKhot and Bun Mam. 27. It is considered that Vietnamese cuisine ______. A. always combines taste and colour B. originated from the North C. became more and more popular D. can be found only in Northern Vietnam 28. What are the features of Northern Vietnamese food? A. It’s sweet and sour. B. It’s a bit fatty and salty. C. It’s light and balanced. D. It's delicious and healthy. 29. Hue cuisine is notable for its ______. A. bitter taste B. colorful food C. light flavor D. spicy taste 30. In Southern Vietnam, ______. A. the warm weather makes it hard to plant fruit and vegetables B. sugar is often added to dishes C. people love sweet food D. fresh herbs are always used in cooking V. Choose the correct sentence among A, B, C or D which has the same meaning as the given one 31. He kept on working though he was ill. A. In spite of was ill, he kept on working. B. Although illness, he kept on working. C. Despite his illness, he kept on working. D. In spite of being illness, he kept on working. 32. In spite of heavy rain, my brother went to work. A. In spite it rained heavily, my brother went to work. B. Although it rained heavily, my brother went to work. C. Although of heavy rain, my brother went to work. D. Despite it rained heavily, my brother went to work. 33. He is very rich, but he isn’t very happy. A. Although he is very rich, he isn’t very happy. B. Because he is very rich, but he isn’t very happy. C. Although he is very rich, but he isn’t very happy.D. Although he isn’t very rich, but he is very happy. 34. That's the man. I told you about him yesterday. A. That's the man about that I told you yesterday. C. That's the man I told you yesterday. B. That's the man about whom I told you yesterday. D. That's the man whom I told you yesterday. 35. The children laughed a lot because of the funny story
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến