维生素D缺乏性手足搐搦特征性改变是( )
A．血糖减低B．低血钾C．血钙降低D．血清清蛋白浓度降低E．sIgA低
参考答案：C
中暑指数
_____is no need for me to say anything about his action_____it speaks for itself.
A．It; if
B．This; as long as
C．There; because
D．Here; while
