问题
单项选择题
污水箱循环采用（）
A.真空泵
B.电动泵及过滤组件
C.引气增压循环
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
污水箱循环采用（）
A.真空泵
B.电动泵及过滤组件
C.引气增压循环
参考答案：A
Passage One
Which parts of the elephant’s body are NOT used by the passenger in climbing onto the elephant
A．The front part of either leg or the ear.
B．Its front leg and the ear.
C．The backside and the tail.
D．Its back leg and the tusk.
