优生,就是让每个家庭生育健康的孩子.下列与优生无关的措施是( )
A.适龄结婚,适龄生育
B.遵守婚姻法,不近亲结婚
C.进行遗传咨询,做好婚前检查
D.产前诊断,以确定胎儿性别
答案:D
The goal of a “competition” may simply be ______ fun and enjoy the excitement of trying something new. [ ]
A. to have
B. having
C. having had
D. have
肿瘤侵犯上颌窦后壁和眶底,按UICC的TNM分期中T分期应为
A.Tis
B.T1
C.T2
D.T3
E.T4