下列哪些属于宫外孕（）
A.圆韧带妊娠
B.宫颈妊娠
C.子宫残角妊娠
D.腹腔妊娠
E.卵巢妊娠
参考答案：A, D, E
The foreign teacher __________ in our school for ten years and does not want to leave.[ ]
A. worked
B. works
C. is working
D. has worked
工程与技术的区别和联系。
