胎头连接是指()。
A.枕骨进入骨盆入口平面
B.顶骨进入骨盆入口平面
C.双顶径进入骨盆入口平面
D.双顶径到达坐骨棘平面
E.双顶径到达坐骨结节平面
参考答案:C
Read, look and write.(根据图片所示填空)
1. — How many _____ are there?
— There are eight.
2. — How many hens can you see?
— _____ _____ _____ _____.
3. — How many cows are there?
— _____ _____ _____.
课题论证的过程的实质上是()。