Low-cycle fatigue (LCF) behaviors of a second-generation nickel-based single-crystal superalloys with[001]orientation at 760 ℃ have been investigated.Different
【教学过程】Step 1.Pre-reading activities1.Let’s guess.T:Do you like stories?Ss:...T:Today,I have an interesting story for you.(1)T:Look at this picture(Pictur