【简答题】tuetle.seth ()函数用来改变 。
【单选题】Tourists and loggers are two examples of people who_______.
A.
are a threat to the tribe
C.
should contact the tribe
【简答题】Why should students not be blamed for their language deficiency? (Paras. 6) List two examples.
【简答题】根据吩噻嗪类药物的结构特点,试述有哪几种定量分析方法?