异位妊娠是指
A.受精卵着床于子宫以外B.受精卵着床于子宫+附件以外C.受精卵着床于子宫体腔以外D.受精卵着床于腹腔以外E.受精卵着床于宫颈管以外
参考答案:C
—Have you ever been to Shanghai, Mary?
—Yes, I _____ there for three days with my parents last month. [ ]
A. have gone
B. have been
C. went
D. was
要做好幼儿园公共关系管理,首先需要()做起。
A.从外部
B.从内部
C.兼顾
D.内外都不涉及