管道中流体的沿程阻力是由()而造成的阻力。 A.流体的层间摩擦 B.流体与壁面之间的

题型:多项选择题

问题:

管道中流体的沿程阻力是由()而造成的阻力。

A.流体的层间摩擦

B.流体与壁面之间的摩擦

C.障碍引起流体显著变形

D.液体质点间相互碰撞

考点:锅炉辅机值班员考试中级锅炉辅机值班员中级锅炉辅机值班员题库
题型:多项选择题

视神经孔内通过的结构为

A.视神经
B.视神经、眼动脉
C.视神经、动眼神经
D.视神经、三叉神经眼支
E.视神经、眼静脉

题型:多项选择题

— How ______ is the cinema?

— Twenty minutes' drive. [ ]

A. long

B. far

C. often

D. soon

题型:多项选择题

完成句子

小题1:He has more friends than me .(改为同义句)

I  _________   ________ friends than him .

小题2:He went back home after he cleaned the classroom yesterday . (改为同义句)

He  _____ go home  _______ he cleaned the classroom yesterday .

小题3:The foreigners are visiting the park now .(用 tomorrow改写) 

The foreigners _________  _________ the park tomorrow.

小题4:I think you should finish your homework  first .(改为否定句 )

I _____ think you ______ finish your homework first .

小题5:You are not as popular as your best friend (改为同义句  )

Your best friend is  ____  _____ than you .

小题6:We were lisenting to the teacher when she came in .( 对划线部分提问  )

_______   _______  you  ______ when she came in ?

小题7:He does his homework every day .( 用at this time yesterday改写句子  )

He  ______  ______ his homework at this time yesterday .

题型:多项选择题

以下哪些设备不属于车道设备范畴()。

A.票打

B.监视器

C.显示器

D.计算机

题型:多项选择题

化学药品注册分类分为

A.5类
B.6类
C.9类
D.15类
E.16类

更多题库