席汉式综合征(Sheehansyndrome)属于下丘脑性闭经。
参考答案：错
The teacher asked a difficult question, but finally Ted _____ a good answer.
A．came up with
B．put up with
C．caught up with
D．kept up with
A．缝衣针悬浮在液面上是由于液体浮力的作用
B．多晶体的物理性质是各向异性的
C．液晶的光学性质具有各向异性
D．晶体有确定的熔点
