帕金森病病理多巴胺能神经元胞浆主要病理改变是()。
A.神经元变性
B.神经元缺失
C.路易小体
D.黑色素减少
E.老年斑
参考答案:C
酸雨对土壤、森林和建筑物等都有较强的破坏和腐蚀作用。酸雨是指pH在什么范围的雨和雪[ ]
A.pH<3.6
B.pH<4.4
C.pH<5.6
D.pH<7
The main issue at the APEC meeting was a climate – change plan by Australia’s Howard and backed by Bush.
A.put out
B.put off
C.put away
D.put forward