子宫内膜异位症用性激素治疗主要作用是
A．调节月经周期B．减轻痛经程度C．精神安慰D．抑制排卵E．促进排卵
参考答案：D
四亿五千万写作[ ]
A．45000
B．450000000
C．45000000
I was just about to jump into the river________the guide stopped me saying "Dangerous". [ ]
A. while
B. when
C. if
D. because
