尖峰电流指单台或多台用电设备持续时间为( )左右的最大负荷电流。
A.1s B.5s C.15s D.30s
参考答案:A
解析: 《工业与民用配电设计手册》第3版。
We are not supposed ______ in class. [ ]
A. eat
B. eating
C. to eat
D. ate
根菜类蔬菜产量虽高,但不耐储存。( )