枕前位胎头入骨盆入口以哪条径线衔接：
A．双顶径
B．枕下前囟径
C．枕额径
D．枕颏径
E．双颞径
参考答案：C
[问题4] 若这三个事务都遵守两段锁协议，那么是否存在事实上可串行化但又不能形成的调度
用所给词的适当形式填空。
1. Su Hai _____ (like) _____ (take) photos.
2. -_____ (do) Yang Ling _____ (like) growing flowers?
-Yes, she _____ (do).
3. -What _____ (do) Yang Ling and Su Hai like _____ (do)?
-They like _____ (play) chess.
4. Mr Black _____ (not like) going shopping. He likes reading books.
