Analysis of test questions: Item A, "silver-like spearhead" is a metaphor for people or things that look good on the surface but are actually useless. What is used here is taken out of context. In item B, "mixing good with evil" means that bad people are mixed with good people. This should be changed to "uneven". In item D, "crying" refers to involuntary shortness of breath and sobbing after crying, and can't stop. Item c, "seeing the micro-knowledge" means that you can know the nature of its development trend or problem by seeing a little sign.