经验可以作为可接受水平的考虑因素。
参考答案:对
The girl was very sad, and she seemed _____ the fact that she didn’t pass the exam.[ ]
A. telling
B. having told
C. to be told
D. to have been told
如图D-12分压器电路中,在开关S闭合的情况下,滑动触头在位置a时输出电压Uex是多少伏?在位置b时输出电压Uex是多少伏?在中点c时输出电压Uex是多少伏?