教室里,声音既单纯,又嘈杂。问其缘故,原来下午又将考试,据说题目极难。时值午休,众人仍埋头苦读,可谓难得。不幸中有了万幸,监考老师下午临时有事未到,请课代表监考。考试进行至一半,忽然一个男生高呼:“无产者联合起来!” In the classroom, the sound is simple and noisy. Asked about the reason, the original test will be taken in the afternoon, and it is said that the title is extremely difficult. During the lunch break, everyone still immersed himself in hard reading. Fortunately, fortunately, the invigilator did not arrive in the afternoon and he was asked to represent the invigilator. Halfway through the exam, a boy suddenly shouted: “The proletarians unite!”