用同样长的三根铁丝分别围成长方形、正方形、圆，其中面积最大的图形是[ ]
A．长方形
B．正方形
C．圆
D．由于不知道铁丝的长度而无法确定
答案：C
男性，65岁，手脚麻木伴头晕三个月，并时常有鼻出血。体检：脾肋下3.Ocm，肝肋下1.5cm。检验：血红蛋白量150g/L，血小板数11OO×109/L，白细胞数21.6×109/L，以中性分叶核为主，NAP积分增高。
该病临床上易并发（）。
A.血栓形成
B.溶血
C.肺部感染
D.骨骼破坏
E.皮肤出血
Questions 6 to 10 are based on the following news.
A. Few people expect a breakthrough on reaching an international treaty. B. The toughest issues on climate change would remain unresolved. C. The United Nations negotiating process itself is at risk. D. The United States entered the talks in a p position.
