The weather symbols corresponding to the foggy weather in Beijing on a certain day are () A, B, C, D,

Analysis: Based on the understanding of common weather symbols, the corresponding symbols of cloudy days can be found by judging the four weather symbols in the options one by one. According to the meaning of weather symbols, A is rainfall, B is heavy snow, C is smog, and D is sunny. So C. Comments: This question is an examination of common weather symbols. The main basis for solving the problem is the understanding and mastery of weather symbols, which belongs to the basic knowledge examination question.