内源性凝血系统始动反应首先是()
A．Ⅻ因子被激活
B．组织因子(Ⅲ因子)激活
C．Ⅷ因子被激活
D．Ⅹ因子被激活
E．Ⅶ因子被激活
参考答案：A
--- _________ my shoes?
--- They're under the bed.[ ]
A. Where's
B. Where're
C. What colour is
