某地区在1周内进行了高血压病的普查，可计算当地高血压病的
A．患病率
B．罹患率
C．发病率
D．病死率
E．家庭续发率
参考答案：A
—Jack, you look very tired today.
—Yes, actually I've been _____ busy these days _____ I can't get enough sleep. [ ]
A. so, that
B. such, that
C. too; to
D. such a; that
串联电容的总电容的（）等于各部分电容器倒数之和。
A、相反数
B、倒数
C、平方
D、开平方
