西双版纳的箭毒木树皮里白色乳汁毒性极大,误入人眼,马上双目失明;人吃后一刻钟就会使心跳停止。这树是()
A.鹤顶红
B.一丈红
C.三步倒
D.见血封喉
参考答案:D
The doctor cured a lot of patients free of charge, so he had a good ________. [ ]
A. evolution
B. occupation
C. reputation
D. revolution
什么氏混合气的余气系数?