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
正确答案是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
正确答案是C