语法填空

     Over time I have been changed quite a lot. I began 1__________ a calculating machine in France in

1642.  2______________ I was young I could simplify difficult sums. I developed very 3(slow)________ and it took nearly two hundred years 4_______________ I was built as an analytical machine by Charles Babbage. After I was programmed 5____________ an operator who used cards with holes, I could

"think"logical and produce 6_____________ answer quicker than any person.

     At that time 7_____________ was considered a technological revolution and the start of my "artificial

intelligence". In 1936 my real father, Alan Turing, wrote a book 8____________ how I could be made

to work as a "universal machine" 9(solve)________________ any difficult mathematical problem. From

then on, I grew rapidly 10_____________ in size and in brainpower.

市场主体具有经济上的( )。

A．局限性
B．独立性
C．保守性
D．战略性