本周蛋白检测的较灵敏的筛选试验是（）
A.热沉淀－溶解法
B.对甲苯磺酸法
C.乙酰纤维素膜电泳
D.免疫电泳法
E.免疫速率散射浊度法
参考答案：B
RAM中的信息既能读出也能写入，是随机存储器。
Venture capital investments used to provide capital for companies initiating commercial manufacturing and sales are most likely to be considered a form of:（）
A. first-stage financing.
B. mezzanine financing.
C. second-stage financing.
