如何计算变压器的次边电压?
参考答案:
公式:U2/U1=N2/N1
式中U2——次边电压;
U1——原边电压;
N2——次边线圈匝数;
N1——原边线圈匝数。
阅读短文,然后根据首字母提示填完单词。
Look at the child over there. His n 1 is Jim Green. He is an English b 2 . He is my new f 3 .
M 4 name is Li Ping. This is o 5 school. It's No. 2 Middle S 6 . My father is a t 7 at the
school. Jim is eleven. I'm twelve. He is in C 8 Two. We are in the s 9 class. We like our school
v 10 much.
男,11岁,发热、咽痛3周后,水肿、少尿,红细胞15~20个/HP,尿蛋白(+),血Cr210μmol/L。
最可能的肾病理改变是()
A.系膜增生性肾小球肾炎
B.IgM肾病
C.膜增生性肾小球肾炎
D.局灶节段性肾小球硬化
E.毛细血管内增生性。肾小球肾炎