早孕期开始的首次产前检查不包括（）
A.详细询间病史
B.系统的全身检查
C.双合诊检查
D.B超确定胎儿外表有畸形
E.骨盆外测量
参考答案：D
Leaves are found on all kinds of trees, but they differ greatly________size and shape.[ ]
A. on
B. from
C. by
D. in
AIDS的传染源为_____________、______________。
