皮皮学,免费搜题
登录
搜题
【单选题】
用如图所示的仪器测量油液粘度,已知D=100mm,d=98mm,l=200mm,h=2mm;当圆筒旋转速度为8r/s时,测得扭矩T=0.4N·m,求被试油液的动力粘度μ。(已经该油液的密度ρ=900kg/m )
A.
0.048Pa·s
B.
0.050Pa·s
C.
0.052Pa·s
D.
0.054Pa·s
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【简答题】Match each paragraph with its main idea.
【单选题】Thousands of years ago people discovered the phenomenon by chance, and this was _____ the idea of the compass first came from.
A.
how
B.
what
C.
where
D.
that
【简答题】A.One hundred years ago. B.Two hundred years ago. C.Hundreds of years ago. D.Thousands of years ago.
【简答题】Read the passage. Match each paragraph with the information it contains.
【简答题】Match each paragraph with its main idea.
【判断题】“楚人围陈,纳顿子于顿”,《公羊传》认为这里谴责了楚君不惜民命,这一说法是否正确?()
A.
正确
B.
错误
【简答题】Read the Passage. Match each paragraph with the information it contains.
【单选题】根据俯视图,选择正确的主视图。
A.
(1)
B.
(2)
C.
(3)
D.
都不正确
【单选题】根据俯视图,选择正确的主视图。
A.
(1)
B.
(2)
C.
(3)
D.
都不正确
【简答题】Read the passage and match each paragraph with the corresponding aspect.