酸性乳饮料需用1M氢氧化钠将pH值调至（）。
A、6.8-7.0
B、6.7-7.0
C、6.9-7.0
D、6.5-7.5
参考答案：B
Of all the sports shoes, Peter bought pair. Then he had some money for socks. [ ]
A. a cheaper
B. the most wonderful
C. the least expensive
D. the dearest
注射用油的质量要求是（）
A.皂化值越低越好
B.皂化值越高越好
C.酸值越高越好
D.酸值越低越好
E.碘值越高越好
