JAksonLAB的Little于1909年采用近亲交配方式培育出了第一近交系()。
A、DBA
B、CBA
C、C3H
D、BALB/C
参考答案:A
— I am ________ endless examinations.
— Cheer up, David.Keep on until the college entrance examination ends. [ ]
A. caught up with
B. come up with
C. fed up with
D. put up with
以高热、无汗和意识障碍为表现的中暑类型是()
A.热痉挛
B.热衰竭
C.热射病
D.先兆中暑
E.轻症中暑