题目

When father bought me a computer for a birthday present 76．      in last year, I felt very excited. As we all know, computers 77．      are getting more usefully nowadays. Much information 78．      can be stored in it. We can learn what has lately happened 79．      in the world on the Internet. People had to do lots of work80．       which was very danger. Now, computers can do it instead. 81．      When an exam is come, I do exercises on my computer. 82．      Then it will correct them but tell me the right answers. 83．      It is convenien某学生用量筒量取液体时，将量筒平放且俯视读数．读数为20mL，则该学生实际量出的液体的体积（　　） A、大于20mLB、等于20mLC、小于20mLD、无法确定