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Anonymous users2024-01-24A. The implementation of "soy sauce plus iron" can supplement iron to the human body, so A is wrong;
B. The lack of iodine in the human body makes it easy to suffer from iodine deficiency disease, so B is correct;
C. The lack of fluorine in the human body is easy to produce caries, so C is correct;
D. Children with calcium deficiency are susceptible to rickets and malnutrition, so D is correct so choose: A
A. The power arm of the scissors with a handle longer than the knife edge is larger than the resistance arm, which is a labor-saving lever, and the chicken bones can be labor-saving, which is correct and does not conform to the topic; >>>More
A. The pressure cooker has good sealing, which is the use of the characteristics of the liquid boiling point rising with the increase of air pressure above the liquid surface, which is correct and does not conform to the topic >>>More
A. The pressure cooker has good sealing, which is the use of the characteristics of the liquid boiling point rising with the increase of air pressure above the liquid surface, which is correct and does not conform to the topic >>>More
A. The treatment method of gas leakage is to close the valve first, and then open the doors and windows for ventilation, and cannot use electricity (turn on the ventilation fan, turn on the light), etc., so A is wrong; >>>More
A. The detergent has an emulsifying effect on the oil stain, and the kitchen detergent forms an emulsion after cleaning the oil stain, so A is correct; >>>More