单项选择题To describe very small changes in a graph, which of the following verbs or phrase can be used? A、 To reach a plateau B、 To decline C、 To climb D、 To peak
单项选择题心包积液：心界向左右两侧扩大，极似双侧心室扩大，坐位时心浊音界呈三角形（烧瓶形），仰卧位时心底部浊音区增宽，这种心浊音界随体位改变而变化是心包积液的特征 A、正确 B、错误
