【单选题】女,2岁。因智力低下就诊,查染色体核型为46,XX,-21,+t(21q21q),其母亲核型为45,XX,-21,2l,+1(2lq21q),若再生育,其下一代发生本病的风险为
【单选题】The car-renting rate remains $ 99if you ______.
A.
return the car to where you rent it
B.
drive within the same city
【单选题】—Excuse me, could you tell me ________? —My name is Betty Green. [ ]
【单选题】— Could you tell me__________ Zhang Daqian Museum? —The day after tomorrow, I think. [ ]
【单选题】母亲的核型为 45 , XX ,- 21 ,- 21 ,+ t ( 21 ; 21 )( p11 ; q11 ),其子患先天愚型的可能性是( )。
【单选题】女,2岁。因智力低下就诊,查染色体核型为46,XX,-21,+t(21q21q),其母亲核型为45,XX,-21,-21,+t(2lq21q)。若再生育,其下一代发生本病的风险为
【简答题】单词 1. These stores like ______( 展示) their goods in large windows. 2. You break the law if you drive without a driving _______( 执照)。 3. When you buy something from a shop , don’t forget to ask for a __...
【单选题】He did his homework carefully for fear that he ___