列表介绍卵巢良性与恶性肿瘤的鉴别诊断。
参考答案：
This girl is ready to help people any time. When she is on the bus, she always
her seat to someone in need.
A．gives
B．give
C．gave
D．giving
羊水栓塞时可引起（）
A．软产道裂伤
B．胎盘滞留
C．胎盘嵌顿
D．胎盘植入
E．凝血功能障碍
her seat to someone in need.