Analysis of test questions: everything has defects, and only defects can show its richness. The defects themselves are correct but not the main reason explained in this paragraph. Therefore, item 1 is correct in itself, but it doesn't meet the meaning of the question. The "imperfect beauty" in the title shows that things with "imperfect beauty" also have their aesthetic value. Aesthetic standards vary from person to person and have diversified characteristics. The meniscus itself embraces the perfection of the future, which shows that there is a connection between "imperfect beauty" and "perfection". Choose item d in this question.

Comments: This is an explanatory multiple-choice question. Answering the materials, questions and correct answers clearly provided by this kind of multiple-choice questions are hidden in various options, and students are required to make choices on the basis of fully understanding the materials and options. Ask students to explain whether the explanation in each option is consistent with the information provided in the material. This question is moderately difficult.