根据WHO估计，目前世界就业人口占全球总人口的( )
A．30% B．40%C．50% D．60%
参考答案：C
________ of her happy childhood by the song, Grandma sang along with it in a soft voice.
A．Reminded
B．Reminding
C．Having reminded
D．Being reminding
若2cos（α+15°）=1，则α=______度．
