等腰三角形的一个外角是100°,它的顶角的度数为[ ]
A.80°
B.20°
C.80°或20°
D.80°或50°
C.
超声心动图检查不能够帮助诊断或排除的心血管疾病是()
A.先天性心脏病
B.风湿性心脏病
C.肥厚梗阻型心肌病
D.急性心肌梗死合并机械并发症
E.心肌炎
--- James, we have lost the last match against LA. I suppose I should be the one to blame.
--- Oh, ______. It was just a game, and we still have nearly a whole season to go through.
A. Forget it. B. Take it easy. C. Not at all. D. Don’t say so.