【判断题】醋酸和醋酸钠混合溶液具有抗酸和抗碱能力,但是不具有缓冲作用。( )
【单选题】I'm impressed with his persistence. When he had a problem to solve, he________work at it until he found an answer. [ ]
【简答题】Although he has sought to find a peaceful solution, he is facing strong mil______ pressure to use force.
【多选题】下列关于清除浮动的方式,说法正确的是()?
B.
父级元素加属性overflow:hidden;,但是个别属性功能会受到影响
C.
浮动元素添加一个空的兄弟标签 ,给其设置clear:both;
【简答题】醋酸和醋酸钠混合溶液具有抗酸和抗碱能力,但是不具有缓冲作用。____
【单选题】随年龄的增长到成熟期以后所出现的身体退化称为