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【单选题】
下列各项中,不属于销售费用的是A.
商品运输费
B.
商品维修费
C.
利息收入
D.
广告费
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举一反三
【简答题】small pore diffusion law
【单选题】According to the Laplace Law, if large and small alveoli are connected to each other, and their surface tension is equal, then ( )
A.
there’s high pressure in small alveolus, low pressure in large alveolus
B.
there’s low pressure in small alveolus, high pressure in large alveolus
C.
the pressure in large and small alveoli is equal
D.
during inspiration, gas mainly enters small alveolus
E.
during expiration, gas mainly comes from large alveolus
【简答题】工程上常常从__________、 、 三个方面来评价自动控制系统的总体精度。
【简答题】80÷40=______ 83÷40≈______ 80÷38≈______ 90÷30=______ 90÷29≈______ 92÷30≈______．
【简答题】law of small pores(小孔律)
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