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【单选题】
根据离心机的型号和转速,可大致判断出风机工作时高效工作点的全压P。若风机的型号为G4-73-11No8,n=1450r/min,则该风机的全压为( )Pa。(ρ=1.29kg/m3)
A.
1800
B.
3800
C.
5000
D.
5800
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【判断题】Increading concern about cyber security helps to change public attitudes towards data protection.
A.
正确
B.
错误
【单选题】Public attitudes ______ science
A.
towarding
B.
toward
C.
to toward
D.
towarded
【简答题】These concerns have been further sti______ by the change in public attitudes to safety and environmental issues, many of which are closely linked to energy.
【单选题】Ongoing developments in medical technology, particularly at the beginning and end of life, may raise awareness of, or concerns about the ethical dimensions of clinical care. There are also changing so...
A.
pain
B.
choice
C.
money
D.
family
【单选题】Only when public attitudes towards the disabled advance as far as laws have ________ be able to take the rightful place in society.
A.
will he
B.
he will
C.
will they
D.
they will
【单选题】碱式滴定管常用来装
A.
碱性溶液
B.
酸性溶液
C.
任何溶液
D.
氧化性溶液
【判断题】镶贴面砖时,面砖不能泡水
A.
正确
B.
错误
【单选题】The author foresees that public attitudes towards cloning in the near future will be ____________.
A.
favorable
B.
unfavorable
C.
uninterested
D.
impartial
【多选题】釉面内墙砖施工时,正确的是()
A.
釉面内墙砖粘贴前要在水中浸泡2小时以上并取出凉至无明水。
B.
阳角处宜采用对45度角拼接,或使用阳角条。
C.
粘贴顺序应从地面以上第二排开始向上粘贴。
D.
遇到电器开关处应采用非整砖拼贴。
E.
镶贴前应先排样,非整砖应留在不显眼的位置。
F.
阳角处不能用非整砖。
【单选题】下列图中的音程为(     )。
A.
极完全协和音程
B.
完全协和音程
C.
不完全协和音程
D.
不协和音程
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