妊娠20周以后，胎儿在子宫内死亡是（）。
A.死产
B.死胎
C.流产
D.早产
E.滞产
参考答案：B
So little ________that the neighbors could not settle their difference .
A．agreed they
B．they agreed
C．they did agree
D．did they agree
传代培养
