问题
单项选择题
The canvas covering of fire hose is called the（）.
A.casing
B.outer hose
C.line cover
D.jacket
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
The canvas covering of fire hose is called the（）.
A.casing
B.outer hose
C.line cover
D.jacket
参考答案：D