在碱性有机药物的色谱分离方法中常需加入碱性试剂是
A．二乙胺
B．氢氧化钠
C．碳酸氢钠
D．石灰水
E．氢氧化钾
参考答案：A
It is reported that a new racing car made from vegetables and powered by chocolate ______in
May, 2009.[ ]
A. will be launching
B. was launched
C. has been launched
D. has launched
下列哪项是加剧肾小球硬化的主要因素
A．三高现象
B．中性粒细胞
C．血小板
D．补体
E．内皮细胞
