【单选题】I'll let you know he comes back.
【单选题】极化曲线的测定实验中, 碳酸铵溶液主要作用
【单选题】I'll let you know___I have news.
【单选题】I'll let you know ___he comes back.
【简答题】I'll let you know ______ he comes back. A.before B.because C.as soon as D.although
【单选题】Don't worry. I'll let you know if anything comes ____. [ ]
【单选题】关于致死剂量的描述,不正确的是
B.
LD50是指化学毒物引起一半受试对象出现死亡所需要的剂量
C.
LD100是指化学毒物引起受试对象全部死亡所需要的最小剂量
D.
LD01是指化学毒物引起试验对象中的个别成员死亡的最低剂量
E.
LD0是指化学毒物不引起试验对象出现死亡的最小剂量