杜甫诗歌的主体风格是 ( )。
A．沉郁顿挫
B．婉而多讽
C．悲凉慷慨
D．质朴刚健
参考答案：A
But for electricity, human life _____ so easy today.
A．isn’t
B．would not be
C．will not be
D．would not have been
既能收敛止血，又能凉血止血的药物是
A．仙鹤草B．紫珠C．血余炭D．棕榈炭
