Trong khoảng thời gian từ 21 – 3 đến 23 – 9 ở bán cầu Bắc có ngày dài hơn đêm do: 

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• I don’t advise anybody_______ in that hotel. It’s not clean enough.

• We have to apply effective measures to save many plant and animal species _______ extinction.

• Giá trị nhỏ nhất của hàm số: trên đoạn  là:

• Fill in each numbered blank with one suitable word or phrase
  Sociologists have been carrying out research into the social pressures of being a teenager. Many adolescents are unhappy at school because they find it difficult to (1) ____ friends. This stress can bring on illness or result in poor grades. They may also worry about their appearance and often feel (2) enormous pressure to dress, talk and behave the same as (3) . This phenomenon is called peer pressure, and it is very common in today’s society. Advertising contributes a lot to the social pressures teenagers feel. Advertisers know how important it is to feel that you belong to a group when you are in your teens, so they try to persuade teenagers that certain products will make them (4) ___ with their classmates. Sadly, many teenagers act irresponsibly and even do dangerous things just to make others accept them. Peer pressure is often the reason for teenage smoking, drug (5) _or dangerous driving. Teenagers need to learn to say no to social pressure and to find friends who they can talk things over with when they have a problem.
  Question 1.
  
• Cho $f\left(x\right)=\frac{x}{{\cos }^{2}x}$ trên $\left(-\frac{\pi }{2};\frac{\pi }{2}\right)$ và $F\left(x\right)$ là một nguyên hàm của $x.f\text{'}\left(x\right)$ thỏa mãn $F\left(0\right)=0$ . Tính $F\left(\frac{\pi }{3}\right)$ ?
  
• Đoạn chương trình sau làm gì: For i:=length(a) downto 1 do Write (a[i] );
  

• Nghiệm của phương trình là:         

• Trong không gian cho hai vectơ Giá trị của biểu thức bằng
  

• I ______________arrive at parties on tine here because I didn’t know Vietnamese culture well.

• Người Mãn chiếm Trung Quốc đã lập nên triều đại nào