下图是某地气温年变化曲线图,据此判断该地位于
A、热带
B、北温带
C、南温带
D、寒带
答案:B
Every evening the students go to bed at 10:30______ and the lights are turned off.
A.at once
B.on purpose
C.at present
D.as usual
男,49岁,既往体健,因头晕半天,黑便3次,急诊。血压80/50mmHg,心率124次/分,面色苍白,冷汗。
首先考虑()。
A.急性肠炎
B.急性胃穿孔
C.心绞痛
D.心肌梗塞
E.食管下段癌出血