首页/ 题库 / [单选题]管路由直径为57×3.5mm的细管,逐渐的答案

管路由直径为57×3.5mm的细管,逐渐扩大到108×4mm的粗管,若流体在细管内的流速为4m/s。则在粗管内的流速为_______。( )

单选题
2021-09-01 22:49
A、2m/s
B、1m/s
C、0.5m/s
D、0.25m/s
查看答案

正确答案
B

试题解析

相关题目
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

函数 青书学堂.png 的定义域为
函数 青书学堂.png 的定义域为
管路由直径为57×3.5mm的细管,逐渐扩大到108×4mm的粗管,若流体在细管内的流速为4m/s。则在粗管内的流速为_______。( )
1_____education is the instruction that occurs when the instructor and students are separated by distance or time,or both
在稳定流动系统中,水由粗管连续地流入细管,若粗管直径是细管的2倍,则细管流速是粗管的()倍。
一台水泵吸入管直径为108×4mm,压出管直径为76×2.5mm,吸入管线的流速为1.5m/s,压出管线的流速为()。
P-P间期逐渐缩短直到P波受阻,ORs波群脱落()
正确表示公称直径为24mm,螺距为1.5mm,方向为左旋的细牙普通螺纹。()
索引符号是由直径为()mm的细实线圆和细实线的水平直径组成。
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.
已知A=40;B=30;C=100;D=50,逻辑“与”运算符为and,“或”运算符为or,“非”运算符为not。计算表达式(A>B+20)or(B+60<>
Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
孔隙直径()mm或裂缝宽度()mm的孔隙为微毛细管孔隙。
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire,()the claimant proves that the fire arose from fault or neglect on the part of the carrier,his servants or agents.
Shutdown price(or point,or rule) 停业价格(或停业点、停业原则)
广告位招租WX:84302438

免费的网站请分享给朋友吧