随着精密铸造工艺的发展,现在透平动叶一般采用()的精密铸造工艺得到。
参考答案:耐热材料
You did not go to the party yesterday, or I ___ you.
A.would see
B.could meet
C.might have seen
D.might see
简述菌种的保藏方法。