Merge remote-tracking branch 'origin/yangwu1.3' into 1.3nsq

chenshijun

2019-03-30 23bd97eaa5626ad96ca3f5d3e97e93d14705ca6d

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aeroplane
bicycle
bird
boat
bottle
bus
car
cat
chair
cow
diningtable
dog
horse
motorbike
person
pottedplant
sheep
sofa
train
tvmonitor