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流产发生时间不同,其症状不同,早期流产一般先有腹痛再出现阴道流血,晚期流产一般先有阴道流血再有腹痛。

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在C语言程序中调用汇编语言程序的方法是使用EXTERN关键字。

In most cases, in a lab report, the data from an experiment may be presented in the form of written text with the visual aids like tables and charts.

GPIOx_ODR用于存储待输入数据,可对其进行读/写访问。

Simple past tense is usually used in the Methods section of a research proposal, and future tense is used in the Methods section of a research paper.

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