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【简答题】
截面为b×h=23×23cm 2 的方形管，长l=30m，输送标准状态空气(ν=1.6×10 -5 m 2 /s，ρ=1.23kg/m 3 )，流量为Q=0.675m 3 /s，设ε=0.09mm，试求压强降△p。
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举一反三
【单选题】Users select the people to whom they wish to send information . ( to whom 为什么从句?)
A.
主语从句
B.
宾语从句
C.
定语从句
D.
同位语从句
【单选题】阅读理解, Passage 12 Homesick is a compound(复合) word made up of HOME and SICK. You know whateach word means on its own, of course. But think about what the words mean when they areused together Homesick m...
A.
B.
C.
D.
D
【单选题】)19. Which of the following is true according to the passage? A. The meanings of some compounds are easy to know B Seasick means SICK FOR SEA C Homesick means SICK FOR HOME D Both A and C
A.
B.
C.
D.
D
【单选题】Part II Reading Comprehension (25 minutes)Section ADirections:In this part there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word...
A.
pursuits
B.
updated
C.
unsupported
D.
download
E.
credibility
F.
detects
G.
inflict
H.
perceived
I.
unsolicited
J.
guaranteesK. authorizedL. considerableM. vigilantN. curseO. unauthorized11. _______
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