“五粮液”是我国名酒之一,它产于()
A、贵州省仁怀县
B、四川省宜宾市
C、四川省绵竹县
D、山西省汾县
参考答案:B
描述被动扩散过程
A.吸收B.分布C.代谢D.排泄E.转运
We should________the lights when we leave our classroom because we must save electricity. [ ]
A. switch on
B. switch over
C. switch off
D. switch through