全自动生化分析仪抗交叉污染的措施有（）

A.自动清洗加样针和试剂探针

B.自动扫描比色皿剔除不合格者

C.比色皿自动冲洗功能

D.应用惰性液胶膜技术减少探针内外管壁交叉污染的概率

E.自动将加完的标本取出

Which of the following is NOT an advantage of exchange traded funds (ETFs) over traditional mutual funds（）

A. ETF shares trade throughout the day at continuously updated prices, while open-end funds trade only once a day at close-of-market prices. 

B. The exposure to capital gains taxes is lower for ETFs than for open-end funds. 

C. ETF shares have smaller bid-ask spreads than open-end mutual funds.