水獭 发表于 2025-3-26 22:22:20
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Vascular,ltrasound. The Doppler effect is the change in frequency of a wave due to movement of the source or observer. In sonography, the ultrasound is sent by a stationary transducer to a moving target (blood). The ultrasound beam reflected by moving red blood cells show an increase in frequency when the bloblique 发表于 2025-3-27 15:06:28
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Interventional Ultrasound, to guide procedures when the lesion is visible on sonography. Ultrasound is not expensive and, thus, is widely available. It does not use ionizing radiation, which is especially important in procedures that may be long. It allows real-time continuous monitoring of the position of the needle. The eqTEM 发表于 2025-3-27 23:45:05
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http://reply.papertrans.cn/59/5829/582839/582839_39.pngLAVA 发表于 2025-3-28 14:03:33
Angel Bueno,Jose Martel,Ana Sanz, 2015): Die Vermittlung von Wissen vollzieht sich in weiten Teilen in der mündlichen Unterrichtskommunikation; das sprachliche Zusammenspiel von Lehrenden- und Lernendenäußerungen hat entscheidenden Anteil an den Lerngelegenheiten der SchülerInnen. Aus dieser Sicht erscheint eine Erforschung der ‚U