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【多选题】
土地利用系统分 析的步骤包括A.
土地系统边界确定
B.
可行性分析
C.
土地评价
D.
结构优化
E.
综合整治
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举一反三
【单选题】What does the expression 'fall flat' in the last paragraph probably mean based on the context?
A.
serve their function
B.
fail to take effect
C.
meet the expected demands
D.
dropped down and broken into pieces
【单选题】Based on the figure, does S depend on the frequency of a sound wave of a given intensity?
A.
Yes, because as frequency increases, S increases.
B.
Yes, because as frequency increases, S remains constant.
C.
No, because as frequency increases, S increases.
D.
No, because as frequency increases, S remains
【简答题】一台他励直流电机气隙转速为1000r/min时,其电枢电动势 V,若维持励磁电流不变,且不考虑电枢反应,转速降为500r/min时,电枢电动势 ( )V
【单选题】Questions are based on the following passage. 'Innovative' does not necessarily mean radical or expensive， nor do the best ideas comefrom the top. A woman on the shop floor at Ford suggested putting s...
A.
everything that is beneficial to people can be said to be innovative
B.
even the common people can put forward an innovative suggestion
C.
people are easy to accept new things that are helpful to them
D.
the ideas from the top sometimes are not as good as those from ordinary people
【单选题】In a gold-based alloy，copper does which of the following( )
A.
prevents corrosion
B.
increases malleability
C.
increases hardness
D.
A and B
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