性功能障碍是一组与________密切相关的性活动过程中的某些阶段发生的________。
参考答案：心理社会因素；性生理功能障碍
若方程2x－a=4的解为正数，则a的取值范围是 ．
— Foreign trade has been developing very fast in Guangdong.
— Yes. Guangdong is China’s largest province ___ foreign trade volume.
A．in terms of
B．in place of
C．in charge of
D．in favor of
