问题
单项选择题
管路系统的特性曲线是随着（）的增加而上升。
A、流量
B、扬程
C、轴功率
D、效率
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
管路系统的特性曲线是随着（）的增加而上升。
A、流量
B、扬程
C、轴功率
D、效率
参考答案：A
Passage One
What is the speaker’s opinion of the idea that electronic instruments will destroy classical music
A．He is surprised by it.
B．He disagrees with it.
C．He thinks it is too soon to tell.
D．He is alarmed by it.