接地电网接地电阻值测定周期为()一次。
A.每月
B.每季
C.每半年
参考答案:B
Turkey opened the world's first trans-continental underwater rail tunnel._Asia and Europe on 29 October, 2013,_closer the day when it will be possible to travel from London to Beijing via Istanbul by train.
A.connected; brought
B.connected; bringing
C.linking; brought
D.linking; bringing
患者女,20岁,2天来发热、腹痛、腹泻,排黏液脓血便,伴里急后重。查体:T39℃,BP130/70mmHg,神志清,无脱水貌,心肺听诊未见异常,腹软,左下腹压痛阳性,无反跳痛及肌紧张。便常规:WBC15~20个/HP,RBC2~3个/HP。
该患者临床诊断是()
A.急性细菌性痢疾普通型
B.急性细菌性痢疾轻型
C.慢性细菌性痢疾迁延型
D.慢性细菌性痢疾急性发作型
E.慢性细菌性痢疾隐匿型
F.急性细菌性痢疾重型