进行物流调研资料综合分析时间序列分析最常见的内容是( ),并能反映发展变化趋势。
A. 概率分析
B. 增长率分析
C. 风险分析
D. 占有率分析
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依据范迪穆特方程，色谱柱填料颗粒尺寸约小塔板高度越小，理论塔板数越高。
A. 对
B. 错
In thequality clause of export contract, ().
A. in order to clarify the responsibility, more than two methods should be used to express quality
B. for accuracy, two methods should be used to represent quality
C. in order to prevent passivity, it is not suitable to use two or more methods to express quality at the same time
D. it can be expressed by both sample and text description
In international trade, there are many ways to express quality, but（）.
A. only one can be used alone
B. it cannot be used alone
C. it can be used in combination with the specific situation
D. can't be combined to use
When buying and selling by sample, the sample（）.
A. can only be provided by the buyer
B. can only be provided by the seller
C. can be provided by both the buyer and the seller
D. can be provided by a third party
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