The outline of "Peach Blossom Garden in Jinan" is emerging. Jixi Wetland Park, with a little water wave, light fog, fragrant flowers and swaying willow branches. About self-heating in the park

Analysis of the test questions: A. The "white clouds" in the water are images of white clouds in the sky, which are imaged by a flat mirror and belong to the reflection of light. Option A is wrong;

B. Overflow of flowers is a diffusion phenomenon, indicating that molecules are constantly moving, and option B is correct;

C. The willow branches sway, indicating that the willow branches are stressed, and the force can change the motion state of the object. C option is correct;

D. Fog is a small water drop formed by water vapor in the air when it is cold, which belongs to liquefaction phenomenon, so option D is correct;

The answer to this question is BCD.