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【简答题】
用一标准型旋风分离器净化含尘气体。已知粉尘的密度为2000kg/m 3 ,气体的密度为1.1kg/m 3 、黏度为19.1×10 -6 Pa·s、处理量为7000m 3 /h。若分离器最大允许压力降为2kPa,试计算标准型旋风分离器的尺寸。
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参考答案:
举一反三
【单选题】点作曲线运动时,“匀变速运动”指的是()
A.
a τ =常矢量
B.
a τ =常量
C.
a=常矢量
D.
a=常量
【单选题】-What kind of gift should we buy for her? -I think we should buy something to make her feel better. [     ]
A.
enough interesting
B.
interesting enough
C.
enough interested
D.
interested enough
【判断题】全数检验适合于批量较大、价值较低、质量特性多且质量稳定或具有破坏性的检验。
A.
正确
B.
错误
【单选题】I want to ___________ a gift __________ my mother. [     ]
A.
 by, for
B.
 buy, four
C.
 buy, for
【单选题】The Debate over Genetically Modified Foods ?Rice with built-in Vitamin A that can help prevent blindness in 100 million children suffering from Vitamin A deficiency ?A tomato that softens more slowly,...
A.
Y
B.
N
C.
NG
【多选题】我国注重国家形象塑造,增强对外话语的创造力、感召力和公信力,提高国际话语权,就要做到( )
A.
搞好文化扩张
B.
讲好中国故事
C.
传播好中国声音
D.
阐释好中国特色
【单选题】I want to buy a gift _____________ my family. [     ]
A.
to
B.
for
C.
in
【单选题】I ____________ to buy a gift for my mother. [     ]
A.
played
B.
wants
C.
wanted
【单选题】点作曲线运动时,“匀变速运动”指的是: 。
A.
切向加速度矢 常矢量
B.
切向加速度大小 常量
C.
全加速度矢 常矢量
D.
全加速度大小 常量
【单选题】According to the passage, the disappear of the West's advantage may be due to______.
A.
the global communications revolution.
B.
the rising of the Oriental.
C.
some technological change happened.
D.
globalization.
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