下列化合物中,既能与盐酸反应,又能与氢氧化钠反应的是
( )
①小苏打②纯碱③氧化铝④丙氨酸
答案:D
The reporter asked the man _____ questions, but he said _____ words.[ ]
A. many; few
B. much; a little
C. a lot of; a few
D. some; little
葡萄酒在酿造过程中去除葡萄的梗是因为()
A、葡萄梗中的单宁收敛性太强
B、去除杂质
C、梗有苦味