If C is defined as a character variable, the correct one in the following statements is ( ).
A. c='97';
B. c="97";
C. c=97;
D. c="a";
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An algorithm can only be implemented in one programming language
Program is the concrete realization of algorithm in a programming language
The essence of computational thinking is abstraction and ( ).
A. recursion
B. loop
C. branch
D. automation
Which algorithm does playing chess embody ( )?
A. Greedy Algorithm
B. Artificial intelligence algorithm
C. Data mining algorithm
D. Backtracking algorithm