Cho  tập hợp , , chọn mệnh đề đúng?

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Một số câu hỏi khác có thể bạn quan tâm.

• Anken C₄H₈ có bao nhiêu đồng phân khi tác dụng với HCl chỉ cho một sản phẩm cộng hữu cơ duy nhất?
  

• Albert is 85 and lives alone. He needs somebody to look ______ him.

• Tìm ${\displaystyle \int \frac{6x+2}{3x-1}\text{d}x}$ .
  
• Fill in each numbered blank with one suitable word or phrase
  Dear Mum and Dad,
  This is just a quick letter to let you know that I'm fine. We're all working quite hard because the exams are only a few weeks away, but our teacher (1)____________he thinks we'll do well.
  Anyway, we had a wonderful time at half-term. I went off to Paris for a few days with some of the others from the school, and we _. went on a guided tour of the city. We saw most of the famous (2)_________ like the Louver, where they have an amazing collection of paintings, and the Eiffel Tower.
  Then we went down to the south of France (3) _________train. It was so fast - the whole journey was only about four hours. We spent a little time in Nice and in Cannes as well, and we all really enjoyed it. On our last day we went to a small island called the Ile des- Pelerins, and we saw the castle (4)_________they used to keep the 'Man in the Iron Mask'. All in all, we had a great time and the weather was really good as well. The only thing I felt (5) __________about was that we didn't have enough time to spare to go swimming - maybe next time.
  Question 2.
  
• Đọan chương trình sau cho ra kết quả gì?
  A:=0;
  If a>0 then a:=1;
  Writeln(a);
  
• Tính L =
  
• Tích phân ${\displaystyle \underset{0}{\overset{1}{\int }}\left(x-2\right)e^{2x}}\text{d}x$ bằng
  
• Công nghiệp sản xuất hàng tiêu dùng bao gồm :
  
• Trong các câu sau đây, câu nào sai
  
• [2D4-3. 2-3] Tính diện tích hình phẳng giới hạn bởi các điểm biểu diễn các số phức thỏa mãn $\left|z+2-i\right|+\left|z-4-i\right|=10$ .