进行安全评价时,利用具有密切关系(或相似)项目的有关资料,来代替被评价项目所缺少的资料。这种安全评价依据的安全评价原理是代替推算法。
参考答案:对
You had better ________some food and drinks before the field trip ________.
A.to bring; starts
B.bring; starts
C.bringing; started
D.bring; started
冷藏食品要恢复到新鲜状态应做到()
A.急速冻结,缓慢化冻
B.快速化冻
C.缓慢冻结
D.先快冻结30min,再缓慢冻结
E.缓慢冻结,缓慢化冻