【简答题】当 时,分式值为0.当 ____时,分式 值为0.
【简答题】当= 时,分 式值为0.当 =____时,分 式 值为0.
【简答题】当a=______时,a+3没有倒数;当a______时, a+|a| a =0.
【简答题】当= 时,分式值为0.当 =____时,分式 值为0.
【单选题】What will the FDA do before announcing its final decision?______.
A.
They'll do more research.
B.
They'll consider public opinion.
C.
They'll ask experts for advice.
D.
They'll wait for government's decision.
【单选题】男子疝气,女子带下瘕聚为何经病变( )。