西双版纳所属省级行政区是[ ]
A．广东省
B．广西壮族自治区
C．云南省
D．贵州省
答案：C
Which of the following employment measures is most closely related to the level of real GDP（）
A. Labor force participation ratio.
B. Number of employed.
C. Aggregate hours.
双头螺纹M42×2的导程为2mm。
