【单选题】Part A Directions: You will hear a talk. As you listen, answer Questions 1-10 by circling TRUE or FALSE. You will hear the talk ONLY ONCE. You now have 1 minute to read Questions 1-10. 听力原文: Good morn...
【单选题】常规慢性毒性试验最主要的目的是
A.
通过明确毒效应及其剂量反应关系获得NOALE和LOAEL
B.
探讨剂量反应关系,确定机体发生损害效应的强度变化
D.
为其它试验剂量设计提供数据,并推断其半数致死剂量。
【单选题】气体的温度从 50 °C 升高到 9 0°C ,则它的热力学温度升高了
【单选题】听力原文:Do you think it is possible for anyone to make a living out of simply writing books? (A) I suppose it depends on what sort of books you're writing. (B) I met a woman the other day who writes chil...
【单选题】以下观点,你认为不合理的是
C.
因为含有盐分而会锈蚀钢筋,制造混凝土不宜使用海沙
【简答题】3 What sort of books are prohibited for a young man?