单项选择题
在同一线槽内（包括绝缘层在内）的导线截面积总和应该不超过内部截面积的 A.
40% B.
45% C.
50% D.
55%
在同一线槽内（包括绝缘层在内）的导线截面积总和应该不超过内部截面积的 A.
40% B.
45% C.
50% D.
55%
你可能感兴趣的试题
单项选择题
The most remarkable bronze statue in the tomb of Liu Sheng, King Jing of the Western Han dynasty, is ().
The most remarkable bronze statue in the tomb of Liu Sheng, King Jing of the Western Han dynasty, is ().
A．Boshan Censer inlayed with gold and silver
B．Gold and silver inlaying copper teapot with bird zhuan characters
C．Changxin Palace Lamp
D．White jade carved with double dragons
单项选择题
A．
B．
C．
D．