下面哪一种情况不属于脑血管意外的发病特点
A．大多发生于中老年人B．发病率低C．患病率高D．病死率高E．致残率高
参考答案：B
解析：发病率高。
Do you know ______________ last Sunday?
A．where they had a picnic
B．where did they have a picnic
C．where they have a picnic
D．where will they have a picnic
张拉预应力混凝土结构的预应力筋应以()进行控制。
A.张拉应力值
B.预应力筋的伸长率
C.总张拉力
D.张拉应力及预应力筋伸长值双控
