左乳腺外上象限发现一孤立无痛硬结,不移动,可能为()
A.乳腺囊性增生症
B.左乳腺导管内 * * 状瘤
C.左 * * 脓肿
D.左乳癌
E.左 * * 结核
参考答案:D
The project is based on an agreement, one of ________ purposes is to ensure that the project can be accomplished before the deadline.
A.its
B.which
C.whose
D.what
产前诊断主要从以下四个方面进行检测,即____、____、____、____。