The play           next month aims mainly to reflect(反映) the local culture．

A．produced

B．being produced

C．to be produced

D．having been produced

用MgO的水溶液测量一台原子吸收分光光度计的检出限，仪器的吸光度标尺扩展10倍，测得的纯蒸馏水及用蒸馏水配制含0.01mg/LMgO水溶液的吸光度值如下。计算MgO溶液的检出限。