大于90°的角都是钝角.______.
大于90°而小于180°的角是钝角,大于90°的角还有平角180°、周角360°等.
故答案为:×.
—Who is that man?
—That _______ be Mr. Green. He always walks this way. Hi! Mr. Green. [ ]
A. can
B. may
C. need
D. must
患者,女,25岁。支气管哮喘发作3天,现大汗,发绀,端坐呼吸,有奇脉。皮质激素的使用正确的是
A.小剂量逐渐递增
B.小剂量长疗程
C.大剂量静脉用
D.大剂量吸入
E.大剂量口服