挖掘机运行时，铲斗离地面应（）左右。
参考答案：1m
At the evening party the host said ________ was able to solve the riddle could get a nice present
as a reward. [ ]
A. whoever
B. who
C. no matter who
D. whomever
目前我国临床实验室测定酶活性浓度推荐温度为（）
A.（25±0.1）℃
B.（37±0.5）℃
C.（37±0.3）℃
D.（37℃0.1）℃
E.（37±1）℃
