可作气雾剂的抛射剂的是
A．氟里昂B．C02压缩气体C．丙二醇D．聚山梨酯80E．胶态二氧化硅
参考答案：C
The athlete's years of hard training ________ when she finally won the Olympic gold medal.[ ]
A. went on
B. got through
C. paid off
D. ended up
