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【多选题】
Marginal costing and absorption costing are different techniques for assessing profit in a period. If there are changes in inventory during a period, marginal costing and absorption costing give different results for profit obtained.Which of the following statements are true?A.
If inventory levels increase, marginal costing will report the higher profit.
B.
If inventory levels decrease, marginal costing will report the lower profit.
C.
If inventory levels decrease, marginal costing will report the higher profit.
D.
If the opening and closing inventory volumes are the same, marginal costing and absorption costing will give the same profit figure.
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举一反三
【单选题】用系统命名法给下面化合物命名，正确命名的一项是：
A.
2,2-二甲基-1-丁烯
B.
3,3-二甲基-1-丁烯
C.
2,2-二甲基-3-丁烯
D.
3,3-二甲基-3-丁烯
【单选题】男，15岁。查体发现水冲脉，主动脉瓣第2听诊区可闻及叹气样舒张期杂音。水冲脉的发生机制是
A.
收缩压和舒张压均降低，脉压不变
B.
收缩压不变，舒张压升高，脉压降低
C.
收缩压降低，舒张压增高，脉压降低
D.
收缩压升高，舒张压降低，脉压增加
E.
收缩压和舒张压均增加，脉压不变