为保证老年人的身体健康，每日应摄入充足的维生素E，目的是
A．抗疲劳B．增进食欲C．抗氧化损伤D．改善睡眠E．防止便秘
参考答案：C
The chairman asked many questions ________ the education of the homeless children in that area.
A．concerned
B．concerning
C．to concern
D．having concerned
符合缺铁性贫血潜伏期的是
A．血清铁蛋白下降B．血清铁下降C．转铁蛋白饱和度下降D．总铁结合力下降
of the homeless children in that area.