生殖激素
参考答案：
对动物生殖活动具有直接调空作用的激素。
傩戏起源于
A．民间
B．宫廷娱乐
C．祭祀活动
D．戏剧舞台
If the island ________ a tourist attraction, last week's earthquake would have caused far more deaths.
A．remained
B．would remain
C．has remained
D．is to remain
