变压器的额定值有哪些?
参考答案:
1.额定容量。2.额定电压。3.额定电压。4.额定频率。5.额定温升
There are three______ workers in this factory. My brother is in it ,too.
A.thousand
B.thousands of
C.thousand of
D.thousands
瓦斯在一定压力下以()和()两种状态赋存在煤体中
A、化合
B、吸附
C、吸着
D、吸收
E、游离