下列有关自我的描述正确的是()
A．自我遵循“现实原则”
B．自我产生于超我
C．自我为超我服务
D．自我代表本能的力量
E．以上观点均不正确
参考答案：A
— We should adopt ________ methods to deal with some incidents.You know, anything could
occur in that situation.
— I got it.Thank you for reminding me. [ ]
A. flexible
B. typical
C. positive
D. concrete
更比冲击断口测膨胀值时测定保留（）位有效数字。
A.三位
B.二位
C.一位
