单选题
A computer can perform 1，000，000 calculations per second．At this rate，how many hours will it take this computer to perform the 3．6 × 1011 calculations required to solve a certain problem?
【正确答案】
B
【答案解析】It will take this computer 
= 3.6 × 105 seconds to perform the calculations. Since there are 3,600 seconds in 1 hour, this is equivalent to 
= 3.6 × 105 seconds to perform the calculations. Since there are 3,600 seconds in 1 hour, this is equivalent to