题目

— _______ did you go to the supermarket last night? —_______ bus. A . How; Take B . How; By C . How; By the 答案：B下表所列各组物质中，物质之间通过一步反应就能实现如图所示转化的是： abcAAl AlCl3Al(OH)3BHNO3NONO2CSi  SiO2H2SiO3DCH2＝CH2CH3CH2OH CH3CHO