下列哪项不符合血友病甲()
A.性染色体隐性遗传
B.关节变形
C.凝血时间延长
D.凝血酶原时间延长
E.Ⅷ因子缺乏
参考答案:D
一个圆柱的底面直径是4厘米,高5厘米,它的侧面积是______,表面积是______,体积是______.
This is the first time that your parents have been abroad, ______?
A.haven’t they
B.hasn’t it
C.aren’t they
D.isn’t it