教师的备课要做好的工作是：钻研教材、_________、设计教法。
参考答案：了解学生
The flowers were so lovely that they in no time.
A．sold out
B．had been sold out
C．were sold out
D．would sell out
以下哪一结构不是由腹膜构成（）
A.卵巢悬韧带
B.卵巢系膜
C.输卵管系膜
D.卵巢固有韧带
E.阔韧带
