关于检验报告规范化管理的基本要求,叙述错误的是()
A.公开
B.完整
C.正确
D.有效
E.及时
参考答案:A
At the sight of the policeman, ____ from behind the door.
A.did the boy rush out
B.the boy was rushing out
C.out rushed the boy
D.rushing out was the boy
雨天、雾天、雷天或大风天气应避免在户外取样,若必须在这种气候条件下取样,应避免给油样带来污染()