第31题: [单项选择]栈和队列的共同点是______。 A. 都是先进后出 B. 都是先进先出 C. 只允许在端点处插入和删除元素 D. 没有共同点 参考答案:C 答案解析:[解析] 栈的特点是后进先出,队列的特点是先进先出,栈只能在栈顶插入或删除元素,队列的插入是在队列的尾进行,删除是在队列的头进行。
第35题: [单项选择]Compact with a traditional polygraph a thermal camera ______. A. can show accurate results B. can easily be handled by anybody C. is a high-tech approach D. is used to fight against terrorism 参考答案:B 答案解析:由第二段的…does not require a highly trained specialist to operate it or interpret its results可知与传统的测谎仪相比