骨干教师的专业发展阶段经历准备期、适应期、发展期和________。
参考答案：创造期
子宫内膜不规则脱落的主要发病机制是（）
A.无排卵，孕激素分泌不足
B.凝血功能异常
C.卵泡发育不良，雌激素分泌不足
D.子宫内膜增生过长
E.黄体萎缩不全
America has more than fifty states, ______, Kentucky, is the place _______ Abraham Lincoln was born.
A．one of it; where
B．one of which; where
C．one of that; which
D．one of which; which
