A group of scientists is observing the behavior of a pendulum. They notice that the pendulum's swing amplitude gradually decreases over time. Which of the following is the primary reason for this decrease in amplitude?

在精神分析治疗中，病人表现出仇恨、愤怒和怀疑的反应，通常与以下哪项因素有关？

Which of the following sentences uses a conjunction to connect two independent clauses?

下列哪种情况下，顺序队列的队头指针和队尾指针会指向同一个数组元素？

疑问法标题的主要特点是什么？