库仑滴定时,搅拌速度太慢有什么影响?
参考答案:
搅拌速度太慢则电解生成的碘得不到迅速扩散,会使终点控制失灵,无法得到精确和准确的全硫测值。
_____ most countries, Japan doesn't offer much access to the Internet to its people who have less money and receive less education.[ ]
A.As for
B.As if
C.As with
D.As of
成语“望洋兴叹”出自
A.《陈有表》
B.《秋水》
C.《大同》
D.《五代史伶官传序》