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
华山海拔2160米,为五岳之中最高的山峰。
The Canterbury Tales, a collection of stories told by a group of pilgrims on their way to Canterbury, is an important poetic work by().
A. William Langland
B. Geoffrey Chaucer
C. William Shakespeare
D. Alfred Tennyson