霍乱确诊依据是
A.接触史
B.典型临床表现
C.排除食物中毒,菌痢等其他疾病
D.脱水,血液浓缩
E.便培养阳性
参考答案:E
如图,△ABC的内部有一点P,且D,E,F是P分别以AB,BC,AC为对称轴的对称点,若△ABC的内角∠A=70°,∠B=60°,∠C=50°,则∠ADB+∠BEC+∠CFA=
A、180°
B、270°
C、360°
D、480°
— You look upset. What's the matter?
— I had my proposal _____ again. [ ]
A. turned over
B. turned on
C. turned off
D. turned down