【单选题】( )是输尿管结石的主要表现,由结石在输尿管内移动所致
【单选题】A study shows that to limit TV viewing may _____ stronger relationships between young people, their friends and their parents. [ ]
【单选题】It is said that ______ young people may lose their abilities to hear after five years if they listen to MP4 players which are too loud for more than five hours a week. [ ]
【单选题】The influence that the reduction of young people has had on economy may include ______.
A.
the appearing of mass market centering the young
B.
the shift of the market center from the middle-aged to the young
C.
the increase of the population who get to form. family
D.
the tendency for the market to split into two
【单选题】提倡精细不苟的“格物之精”的精神的是( )
【单选题】Violence on TV may turn out to have an ______ on some young people.
【单选题】Schools must ensure that most young people ______ the skills and knowledge that may be helpful in their future life. [ ]
【单选题】The beneficaiary can receive the payment only when_____ .
A.
he has shipped the goods
B.
he has presented the documents
C.
the documents presented comply with he credit terms
D.
the importer has taken delivery of the goods