Trong word tổ hợp phím nào cho ta chọn toàn bộ văn bản

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Một số câu hỏi khác có thể bạn quan tâm.

• Phương trình (hằng số ) có nghiệm là:         

• Tổ chức thương mại thế giới còn gọi là:
  
• Các chất trong dãy nào sau đây đều có liên kết ion?
  
• Hình hộp đứng đáy là hình thoi có bao nhiêu mặt phẳng đối xứng?
  

• Cho . Từ lập được bao nhiêu số tự nhiên có chữ số đôi một khác nhau?  

• Fill in each numbered blank with one suitable word or phrase
  Polar bears are in danger of dying out. (1)_______ some other endangered animals, it's not hunters that are the problem, it's climate change. Since 1979, the ice cap at the Arctic Circle where the polar bears live has reduced in size by about 30 per cent. The temperature in the Arctic has slowly been rising and this is (2) _______ the sea ice to melt, endangering the polar bears' home. The polar bears' main sources of food are the different types of seals found in the Arctic. They catch them by waiting next to the air holes seals have made in the ice. (3) _______ the bears are very strong swimmers, they could never catch seals in water. This means that the bears really do rely on the ice to hunt. Polar bears also need sea ice to travel. They can cover a huge territory and often swim from one part of the ice to another. They have been (4) _______ to swim up to 100 km, but when there is less ice, they may have to swim further and this can (5) _______ fatal to the bears. A number of bears have drown in the last few years and scientists believe that it is because they were not able to reach more ice before they became too tired and couldn't swim any further.
  (Adapted from “A Wild Life: My Adventures Around the World” by Martin Hughes - Games)
  Question 3.
  

• At his last attempt the athlete was successful _______ passing the bar.

• Tầng granit bao gồm:
  
• Tìm tất cả các giá trị thực của tham số $m$ để phương trình $\left(x^2+\frac{1}{x^2}\right)-2m\left(x+\frac{1}{x}\right)+1=0$ có nghiệm.
  
  

• Xét các số thực ,  thỏa mãn . Tìm giá trị nhỏ nhất  của biểu thức .