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一般来说,越是发达的地区,出生率越高。()
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我国目前的人口红利呈现上涨趋势。
我国目前人口的性别比例是合理的。
A ________ is anything that can be offered to a market to satisfy a want or need, including physical goods, services, experiences, events, persons, places, properties, organizations, information, and ideas.
Products such as insurance, cemetery plots(墓地), and smoke detectors(烟雾探测器) are examples of ________ goods that are products that the consumer does not know about or does not normally think of buying.
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