【单选题】《中国药典》规定青霉素钠的含量测定方法为( )
【单选题】将He has returned the book.改为否定句。
A.
He hasn't returned the book.
B.
He has returned not the book.
【判断题】After living in Paris for fifty years he returned to the small town which he grew up as a child. ()
【单选题】《中国药典》规定青霉素钠的含量测定方法为
【简答题】After years abroad, he returned to his hometown, ________ he spent his childhood.
【单选题】He ______ that he had been in prison twice before.
【单选题】he head of the company promised to deal with matters of this sort ________ he returned to his office. [ ]
【单选题】《中国药典》规定青霉素钠的含量测定方法为