皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【单选题】
从图解法求得的离心泵装置的工况点来看,如果水泵装置在运行中,管道上所有闸门,那么,水泵的特性曲线与管路的特性曲线相交的点M点就称为该装置的( )。
A.
极限工况点
B.
平衡工况点
C.
相对工况点
D.
联合工况点
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】. ______the zoologists tried to prove was that the photo of the South China Tiger had been staged or technologically dealt with.
A.
That
B.
Why
C.
Whether
D.
What
【单选题】亚硝酸盐食物中毒的机制是
A.
巯基酶失活
B.
溶血作用
C.
卟啉代谢障碍
D.
胆碱酯酶活性被抑制
E.
亚铁血红蛋白氧化成高铁血红蛋白
【单选题】When they got to the South Pole, they found the Norwegians had ____ them in the race to be the first ever to reach it.
A.
hit
B.
fought
C.
won
D.
defeated
【单选题】Tommy had had a three-mile drive north _____ he could turn and head back south.
A.
while
B.
as
C.
before
D.
after
【单选题】_______ snacks and drinks, but they brought cards for entertainment when they had a picnic in South Bank Parklands.
A.
Not only they did bring
B.
Not only did they bring
C.
Not only brought they
D.
Not only they brought
【多选题】关于FM信号解调描述正确的是
A.
宽带FM采用非相干解调
B.
窄带FM只能采用相干解调
C.
窄带FM可采用相干解调,也可采用非相干解调
D.
宽带FM可采用相干解调
【判断题】由于风冷却系统对环境与气候的适应性强,暖机时间短,维护简单,因此风冷却系统得到广泛的应用。( )
A.
正确
B.
错误
【单选题】建筑模数不包括
A.
基本模数
B.
模数数列
C.
分模数
D.
扩大模数
【判断题】由于风冷却系统对环境与气候的适应性强,暖机时间短,维护简单,因此在绝大多数的车用内燃机上被广泛采用。()
A.
正确
B.
错误
【判断题】由于风冷却系统对环境与气候的适应性强,暖机时间短,维护简单,因此在绝大多数的车用内燃机上被广泛采用。( )
A.
正确
B.
错误
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题