美国国土跨两个大洲,它们是[ ]
A.北美洲和大洋洲
B.北美洲和亚洲
C.北美洲和南美洲
D.北美洲和欧洲
A
Tibet is facing a(n)____task to maintain stability and all government workers must be on their highest guard.
A.concerned
B.subtle
C.ridiculous
D.urgent
某男,45岁。肝硬化病史6年,餐后出现上腹部不适,头昏目眩,心悸,汗出。查:心率130次/分,BP100/70mmHg。应考虑为
A.急性胃溃疡穿孔B.急性胆囊炎C.急性胰腺炎D.胃底、食管下段静脉曲张破裂出血E.心肌梗死