男孩，3个月，患儿生后有窒息，出现双侧马蹄内翻足畸形，腰骶摄片LsS．有隐裂，足趾运

命题“等角的补角相等”：题设是______，结论是______．

上颌第一磨牙牙冠上特有的嵴是

A．三角嵴

B．边缘嵴

C．牙尖嵴

D．斜嵴

E．颊轴嵴

现将60℃时，溶质的质量分数为40%的硝酸钾溶液，降温冷却到20℃，得到溶质的质量分数为24%的饱和溶液．由此可求出：______℃时硝酸钾的溶解度是______克．（计算结果精确到0.1）

什么叫光效？

What does the woman mean
[A] She’ll change it for him.
[B] She can’t change it for him.
[C] She’d like to see what is wrong with it.