China Naming Network - Auspicious day query - Before the Spring Festival in Haikou this year, the weather was wet and cold. Xiaoming's mother bought an electric blanket for her grandparents. The electric blanket has two blocks: high temperature and low temperature.
Before the Spring Festival in Haikou this year, the weather was wet and cold. Xiaoming's mother bought an electric blanket for her grandparents. The electric blanket has two blocks: high temperature and low temperature.
Solution:
(1)S should be in contact with 2, because when R is the smallest in the circuit, P is the largest, and when S is connected to contact 2, R is shorted, and only R works in the circuit (as long as it is reasonable)
(2);
（3） ， 。