How do objects pass messages in Java？（） ["They pass messages by modifying each other’s member variables","They pass messages by modifying the static member variables of each other’s classes","They pass messages by calling each other’s instance member methods","They pass messages by calling static member methods of each other’s classes."]
用“茅盾”作笔名的作家是（）。 ["周树人","沈德鸿","郭沫若","谢婉莹"]
《众神的黄昏》是（）创作的。 ["勃拉姆斯","李斯特","莫扎特","瓦格纳"]
简述地震勘探的主要工作环节。
宏观经济政策应该的目标是实现经济稳定，为此要同时达到四个目标：充分就业、物价稳定、（）和（）。
孔板计量工作原理
