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【单选题】
The typical risks of a cost leadership strategy include
A.
the inability to balance high differentiation and low price.
B.
production and distribution processes becoming obsolete.
C.
excessive differentiation to the point where the customer base is too small.
D.
loss of customer loyalty.
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举一反三
【简答题】精馏操作是根据混合物中各组分______的差异,利用多个平衡级、塔顶有液体______和/或塔底有______上升,来实现高纯度分离的。
【单选题】切断过程中,随着工件直径减小,车刀的工作后角()
A.
减小
B.
增大
C.
不变
【单选题】精馏是通过加热造成气液两相体系,利用液体混合物中各组分( )的差异来实现分离的单元操作。
A.
密度
B.
挥发度
C.
溶解度
D.
浓度
【单选题】设 、 均为二阶方阵, ,则分块矩阵 的伴随矩阵为( )
A.
;
B.
;
C.
;
D.
.
【简答题】Others feel there is more of a case for the theory. Harnessing利用 the wind would not have been a problem for accomplished sailors like the Egyptians. And they are known to have used wooden pulleys, whi...
【单选题】Harnessing the wind to ________ electricity dates back to 1890.
A.
cause
B.
bring about
C.
generate
D.
trigger
【单选题】Harnessing the wind to _______ electricity dates back to 1890. ( )
A.
cause
B.
bring about
C.
trigger
D.
generate
【单选题】通常用( )法评定砂的粗细程度和颗粒级配。
A.
筛分法
B.
称量法
C.
负压筛析法
D.
类比法
【简答题】A.肝 B.心 C.脾 D.肺 E.肾 '娇脏'指的脏是( )
【单选题】How Wind Energy Works Harnessing the wind is one of the cleanest, most sustainable ways to generate electricity. Wind power produces no toxic emissions and none of the heat trapping emissions that con...
A.
Y
B.
N
C.
NG
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