It can be inferred that the author sees Zuckerkandl as believing that mathematics is a(n) ______.

A．necessary evil

B．language

C．musical notation

D．great hindrance to full understanding of physics

立式金属罐的最小测量容量是指在收发作业时，罐所排出或注入的最小液体体积。一般为（）液位高度所对应的容量。

A.1m

B.2m

C.3m

D.0.5m