取近似数5.29926≈______．（保留三个有效数字）
5.29926≈5.30，
故答案是5.30．
Nothing can stop a _____ student _____ his mind to give up his studies.
A．promised; to change
B．promised; changing
C．promising; changing
D．promising; to change
糖尿病的典型表现为（）。
A."三多一少"
B.皮肤及外阴瘙痒
C.反应性低血糖
D.起病慢，病情轻
E.起病快，病情重，症状日益严重
