关于滴定分析的方法，最准确的是（）。
A.空白滴定法
B.对照滴定法
C.间接滴定法
D.剩余滴定法、直接滴定法
E.置换滴定法、直接滴定法
参考答案：C
In June 2000, Hanks was offered a scholarship to study in New York City _____ he could have supported his family, but he refused it.
A．by which
B．through which
C．with which
D．in which
在我国，决定自然地理环境差异的两个基本因素是 （ ）
A．地形和水文
B．气候和地形
C．土壤和植被
D．植被和气候
