下载APP
【单选题】
果蝇基因组中，单一序列的基因平均长度是( )。
A.
1～2kb
B.
3～4kb
C.
5～6kb
D.
7～8kb
E.
8～9kb
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Passage Two In 1997, devotees of home electronics eagerly awaited the DVD player, a new device that could play movies without videotape, and with greater clarity. It caught on even faste...
A.
die economic realities of its practicality
B.
robust economic growth
C.
economic problems of hi-tech companies
D.
ignorance of the technology
【单选题】成人食管平均长度及自门齿至贲门的长度（）
A.
22cm，32cm
B.
24cm，34cm
C.
25cm，36cm
D.
25cm，40cm
E.
26cm，45cm