()
A.氧化反应(有MFO催化)
B.氧化反应(非MFO催化)
C.还原
D.水解
E.结合
参考答案:D
He spent at least as much time reading as you _______on line yesterday.
A.had to chat
B.do chatting
C.had chatted
D.did chatting
FANUC系统中G71指令只能加工的()外圆。