与双胎关系不大的是：
A．巨幼红细胞性贫血B．纸样胎儿C．产后出血D．子宫破裂E．尿促性素(HMG)
参考答案：D
It was dangerous for you to swim in that river. You eaten by the fish. [ ]
A. might have been
B. must have been
C. could have been
D. should have been
CDU显示菜单页上显示的〈REQ〉字符表示（）
A、其对应的项目需要输入要求
B、其对应的项目现在有效
C、必须进入的项目
D、需要首先打开的项目
