不孕症病机不包括（）
A.肾虚
B.肝郁
C.血热
D.痰湿
E.血瘀
参考答案：C
呼吸系统由______和______组成．呼吸系统具有适合与外界进行______的结构和功能．
With the help of this new type of calculator, people will be able to __________ the numbers much faster with more accurate figures.
A．work out
B．watch over
C．take apart
D．set down
