诚心难得，谢谢

我试过了，很好，谢了

雪中送炭，非常感谢！

以前试过,并不一定都有的

thanks

i did it just now
it's very helpful
before i met this problem
but later, i think i can solve this kind of problem
thank u again

开课要用，找了好久,多谢!

恩，真是赞

谢谢，总算学会了！