具有保肝作用的成分是（）
A.柴胡皂苷
B.柴胡挥发油
C.柴胡多糖
D.麻黄碱
E.细辛挥发油
参考答案：A
翻译句子
1. We will have to operate on his eyes.
2. They operate three factories and a huge warehouse.
3. What skills are needed to operate this machine?
4. Solar panels can only operate in sunlight.
根据《建筑工程建筑面积计算规范》(GB/T 50353-2005)规定，雨篷结构的外边线至外墙结构外边线的宽度超过( )m者，应按雨篷结构板的水平投影面积的1/2计算。
A．1.80 B．1.90C．2.00 D．2.10
