下列不是子宫破裂原因的是()
A．多胎经产妇
B．手术损伤
C．缩宫素使用不当
D．前置胎盘
E．胎先露部下降受阻
参考答案：D
根据句意，写出括号内所给单词的适当形式。
小题1:You can’t look down on the ___________(able), because it’s equal between people.
小题2:If you have difficulty in making a _______(decide),you can go and ask him for help.
小题3:The noise of the traffic drove Mr Smith much________(mad) night by night.
小题4:I guess these bags are those _________(direct). Please keep them in your office.
闭环控制系统的类型有哪些？
