What was invented by Alan Turing in the 1930s?

問題： What was invented by Alan Turing in the 1930s?

選擇：The jet engine
The television
The Turing machine
The ball pen

正確答案：
3

解釋:

A Turing machine is a theoretical mathematical device invented by Alan Turing (1912-54), a British mathematician, in the 1930s.