It is required that students _____mobile phones at school, so seldom _____them using one.

A．don’t use; will you see

B．should not use; you will see

C．not use; will you see

D．can’t use; will you see

某搀扶，G1P0，孕41周，宫口开大4～5cm，胎心100次／分，胎心监测示“晚期减速”，胎儿头皮血pH值7.18，最恰当的处理为

A．面罩吸氧

B．产妇左侧卧位，等待自然分娩

C．加宫缩抑制剂缓解宫缩

D．立即剖宫产

E．待宫口开全， * * 助产缩短第二产程