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【简答题】
已知不可压缩流体平面流动的流速场为 ,其中,流速、位置坐标和时间单位分别为m/s、m和s。求当t=l sA(1,2)处液体质点的加速度。
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反馈参考答案：
举一反三
【单选题】下列哪两个变量之间的相关程度高?( )
A.
流通费率和利润率的相关系数是 -0.98
B.
销售额和利润率的相关系数是 0.81
C.
价格和销售量的相关系数是 -0.90
D.
销售额和销售量的相关系数是 0.9
【简答题】Assume the following information regarding U.S. and European annualized interest rates: Currency Lending Rate Borrowing Rate U.S. Dollar ($) 6.73% 7.20% Euro (€) 6.80% 7.28% Milly can borrow ...
【单选题】Calculate the net outcome if the spot rate in two months’ time is $/£1.9900 .
A.
￡6532811
B.
￡5619221
C.
￡7856941
D.
￡4998562
【单选题】下列哪两个变量之间的相关程度高( )
A.
商品销售额和商品销售量的相关系数0.9
B.
商品销售额与商业利润率的相关系数是0.84
C.
平均流通费用率与商业利润率的相关系数是-0.94
D.
商品销售价格与销售量的相关系数是-0.91
【单选题】下列哪两个变量之间的相关程度高( )
A.
商品销售额和商品销售量的相关系数为 0.9
B.
商品销售额和商品利润率的相关系数为 0.84
C.
平均流通费用率与商业利润率的相关系数为 － 0.94
D.
商品销售价格与销售量的相关系数为－ 0.91
【单选题】To be honest, I don’t want to tell him unless he ______ me.
A.
asked
B.
asks
C.
will ask
D.
has asked
【判断题】The majority of the people in Britian are descendents of the Anglo-Saxons.
A.
正确
B.
错误
【单选题】What is the topic of the discussion?
A.
Expressions related to art.
B.
Storytelling with pictures.
C.
Art of prehistoric people.
D.
Books designed for children.
【简答题】Mr Hall __________ several mistakes Tom made in the composition and asked him to correct them． [A]took out [B]let out [C]pointed out [D]looked out
【单选题】I am afraid that our plan won’t be passed at the meeting because the majority of the bo ard members are said to _______it. [ ]
A.
against
B.
oppose to
C.
are opposed to
D.
are objected to
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