阴极电泳涂料粒子带负电荷。
参考答案:错
I ____ along the street looking for a place to park my car when the accident _____. [ ]
A. went; was occurring
B. went; occurred
C. was going; occurred
D. was going; had occurred
应急预案应定期评审,并根据评审结果或实际情况的变化进行修订和完善,至少每()修订一次,预案修订情况应有记录并归档。()
A、1年
B、3年
C、5年
D、10年