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问题 单项选择题 A1型题

在定性资料的统计描述中，为说明事物随时间发展的变化趋势时，宜采用动态相对数指标中的（）

A.率

B.构成比

C.相对比

D.定基比

E.以上选项都不正确

答案

参考答案：D

选择题

读近地面①、②、③、④四种气压带等压面与等温面（设气温由赤道向两极递减）示意图，完成1—2题。

1、四种气压带年降水量最多、最少的是[ ]

A．①、②

B．②、①

C．②、③

D．④、③

2、以下关于四个气压带的描述，正确的是[ ]

A．若①位于北半球，则图的左侧是北，右侧是南

B．②地带是台风和飓风的主要发源地

C．③气压带北半球比南半球强

D．④气压带与③气压带之间东北风
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单项选择题

A new ordinance passed by the Gorenton Council a year ago banned the sale of all nonrecyclable plastic packaging for food being sold in Gorenton. A substantial percentage of Gorenton’s plastic waste, however, is still composed of nonrecyclable plastic food packaging.
Which of the following, if true, best contributes to reconciling the apparent discrepancy above ？（）

A．Fewer food products are packaged in nonrecyclable plasticstoday than were so packaged a year ago.

B．The new ordinance affects only plastic food packaging and not other products packaged in plastic, many of which are sold in Gorenton.

C．Grocery and other stores in nearby suburban areas patronized by many Gorenton residents are unaffected by the new ordinance.

D．Many food products formerly packaged in nonrecyclable plastics are now specially packaged in recyclable plastic before being shipped so that they can be sold in Gorenton.

E．The total amount of both Gorenton’s trash and its plastic waste grew considerably over the past year.
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