The twins____the club in 2008 and they____the club for two years.[ ]

A.joined；joined

B．were in;have been in

C．joined；have joined

D．joined；have  been  in

盛装磺胺嘧啶钠注射液(pHl0～10.5)应选择的玻璃容器为

A．中性玻璃

B．含钾玻璃

C．棕色玻璃

D．含钡玻璃

E．含钠玻璃