A1型题 典型霍乱患者,发病后最先出现的症状是().
A. 畏寒、发热
B. 声音嘶哑
C. 剧烈腹泻,继之呕吐
D. 腹部绞痛
E. 腓肠肌痉挛
Questions 17 to 20 are based on the following report. You now have.20 seconds to read Questions 17 to 20. How many people are injured in the incident
A. 11. B. 50. C. 700. D. 800.
100BAST-FX使用2条光纤,最大长度为( ),一条用于发送,另一条用于接收。