fix task.py with no dest_sample_rate task; fix bug in train and infer

mengzhe.cmz

2023-04-12 1ad439f96b8cdbca98ee95b886d692dfa20e85ce

1
2
3
4
5
6
7
8
9
isa    1
dalawa    2
tatlo    3
apat    4
lima    5
anim    6
pito    7
walo    8
siyam    9