“问题串”的设计建议为：（1）“问题串”的设计要有目标性；（2）“问题

The design suggestions for the “question string” are: (1) the design of the “question string” should be targeted; (2) the design of the “question string” should be contextual; (3) the design of the “question string” should be hierarchical ; (4) The design of the "question string" should reflect the inspiration; (5) the design of the "question string" should focus on the students' recent development areas.

The design suggestions of "problem string" are: (1) the design of "problem string" should be objective; (2) the design of "problem string" should be contextual; (3) the design of "problem string" should be hierarchical; (4) the design of "problem string" should reflect enlightenment; and (5) the design of "problem string" should pay attention to the students' recent development area.

The design suggestions of "question string" are as follows: (1) the design of "question string" should be objective; (2) the design of "question string" should be situational; (3) the design of "question string" should be hierarchical; (4) the design of "question string" should reflect inspiration; (5) the design of "question string" should pay attention to the recent development area of students.<br>