Methods: To analyze 1185 cases CT plain scan and observe the circs of high density sign of middle cerebra artery. Some cases were examined by TCD.
方法：对1185例头颅平扫片进行分析，观察大脑中动脉高密度征出现情况，并对部分病例行经颅多普勒(TCD)检查。
In such circs, the enterprise must shorten the time of the product research and development, improve the product quality, reduce the cost and delivery time to continue competition ability.
在这种情况下，企业为了保持竞争能力，必须不断地缩短产品开发研制时间、改进产品质量、降低生产成本和缩短交货期。
In such circs, the enterprise must shorten the time of the product research and development, improve the product quality, reduce the cost and delivery time to continue competition ability.
在这种情况下，企业为了保持竞争能力，必须不断地缩短产品开发研制时间、改进产品质量、降低生产成本和缩短交货期。
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