Child mortality (死亡率)decreased due to improvements in medical care and greater attention to problems related to proper________.
A、resident
B、massacre
C、convict
D、nutrition
出自:兰州工业学院大学英语3

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块