Các hoạt động bảo mật thông tin trong hệ CSDL là gì?

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Vật chất ở nhân trái đất có đặc điểm?
  
• Fill in each numbered blank with one suitable word or phrase
  David Evans is a farmer. He does farming on his own land in Wales. The farm has (1). . . . . . . . . . . . . . his family for generations. The soil is poor. David raises sheep on his land. He does not employ (2). . . . . . . . . . . . . . . . fulltime workers. His sons help him when they are not (3). . . . . . . . . . . school. His wife adds to the family income by (4) . . . . . . . . . . . . . . . eggs which her hens produce. In summer she often takes paying guests into the farmhouse. The guests from the city enjoy their quiet holiday in the clean country air and Mrs. Evans enjoys having some extra money to spend on clothes for her children and herself. However, it is a lonely life for the Evans family when the guests have gone. The question is that if his children want to (5) . . . . . . . . . . . . . . . the farm when Mr. Evans gives up working. Country life is quiet and dull to them. It is quite likely that they will leave the farm for the city some day.
  Question 1.
  
• Người khởi xướng nho học là ai
  

• Cho hàm số  xác định trên  và có đồ thị như hình vẽ. Mệnh đề nào sau đây đúng?              

• Nguyên tử R có tổng số hạt p, n, e  là 13. Số khối của nguyên tử R là:
  

•  

• [2H1-1. 2-2] Khối chóp tam giác đều có nhiều nhất bao nhiêu mặt phẳng đối xứng ?
  

• Cho Tập hợp bằng

• It took women a long time to struggle ________ the right to vote.

• "Don’t take a taxi. We insist_______ in our car.