标志中国结束了靠“洋油”时代的重大事件是[ ]
A．第一个飞机制造厂建成
B．武汉长江大桥建成
C．沈阳第一机床厂建成
D．大庆油田建成
答案：D
最常见的子宫肌瘤变性是（）。
A．囊性变
B．玻璃样变
C．红色变
D．肉瘤变
E．钙化
Hardly ________________ she heard the strange scream coming from behind a tree.
A．had she walked out of the woods than
B．did she walk out of the woods when
C．had she walked out of the woods when
D．she had walked out of the woods when
