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【单选题】
下列关于醛的说法中正确的是 ( )A.
所有醛中醛基和烃基
B.
所有醛都会使溴水和酸性 KMnO 4 溶液褪色，并能发生反应
C.
一元醛的分子式符合 C n H 2 n O 的通式
D.
甲醛在常温下是一种具有强烈刺激性气味的无色液体
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【多选题】某企业每年耗用某种原材料36000千克,该材料的单位成本为20元,单位材料年持有成本为2元,一次订货成本150元,则下列说法正确的是( )
A.
该企业的最佳经济订货批量为2533.59千克
B.
该企业的最佳经济订货批量为2323.79千克
C.
与经济订货量相关最小总成本为4647.58元
D.
与经济订货量相关最小总成本为3595.36元
【单选题】某企业每年耗用某种原材料36000千克，该材料的单位成本为20元，单位材料年持有成本为2元，一次订货成本150元，则与经济订货量相关总成本为（ ）元。
A.
2533．59
B.
2323．79
C.
4647．58
D.
3595．36
【单选题】According to Wang, what did “Dingyou” mean in the ancient?
A.
When parents of officials pass away, they have to resign and return to their hometowns to be in mourning.
B.
A good son does not wander far afield; or if he does so, goes only where he has said he was going.
C.
You should always bear the age of your parents in your mind since the longevity of your parents will be a comfort to you otherwise you may feel dreadful that your parents might die soon.
D.
If you feel you cannot change your parents’ opinion, you should resume an attitude of deference and should not offend them.
【单选题】Which of the following can be inferred from the passage about the myths recorded by the ancient Greeks?
A.
They may have included portrayals of women holding positions of power.
B.
They may have contained elaborate explanations of inheritance customs.
C.
They comprise almost all of the material available to historians about ancient Greece.
D.
They may have contained explanations of inheritance customs and comprised all of the material available to historians about ancient Greece,
【多选题】某企业每年耗用某种原材料36000千克,该材料的单位成本为20元,单位材料年持有成本为2元,一次订货成本150元,则下列说法正确的是( )。
A.
该企业的经济订货批量为2533.59千克
B.
该企业的经济订货批量为2323.79千克
C.
与经济订货量相关总成本为4647.58元
D.
与经济订货量相关总成本为3595.36元
【多选题】某企业每年耗用某种原材料36000千克,该材料的单位成本为20元,单位材料年持有成本为2元,一次订货成本150元,则下列说法正确的有( )。
A.
该企业的经济订货批量为2533.59千克
B.
该企业的经济订货批量为2323.79千克
C.
与经济订货量相关总成本为4647.58元
D.
与经济订货量相关总成本为3595.36元
【简答题】编制弹性预算时，以手工操作为主的车间，可以选用人工工时作为业务量的计量单位。()
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