.(2010·山东滕州高三上阶段性质量检测) 22. For sustainable development, the government has decided to give _______ to those energy-conserving and environment-friendly businesses in many aspects. A. profit B. interest C. preference D. advantage 答案:C下列产品主要成分为二氧化硅的是( )
A、计算机芯片B、太阳能电池C、水玻璃D、光导纤维