The emergency lights can be turned on ______(人工地,手动地)or set to come on ____(自动地)in the event of failure of the primary lighting power.
A.automatically,manually; B.briefly, still; C.manually, automatically; D.adverse, automatically;正确答案C
The emergency lights can be turned on ______(人工地,手动地)or set to come on ____(自动地)in the event of failure of the primary lighting power.
A.automatically,manually; B.briefly, still; C.manually, automatically; D.adverse, automatically;正确答案C