What does the Character Set Scanner command line utility do？（） ["Reports only on any Unicode character conversions required.","Performs character set conversions to the new specified character set.","Scans on any character set conversion required， then converts the data.","Checks for any character definitions that will fail conversion to the new character set."]
以下传感器中输出的信号属于数字信号的是（） ["水温传感器","氧传感器","光电式传感器","电磁式车速传感器"]
股票
给下面的语言单位注音，指出其中的音变现象。
纸老虎
男性，40岁，多年胃、十二指肠溃疡病，近半月来胃病发作，饮食后突然全腹疼痛剧烈，刀割样，血压100/7OmmHg（13.3/9.3kPa），脉搏100/min，全腹压痛，反跳痛，肌紧张。如果上述检查不能确诊，下列哪项检查更有助于确诊（） ["B超","CT","X线","核磁共振","血管造影"]
致命故障
