下列属癌基因(onecgene)的是()
A．p53
B．N-ras
C．bcl-2
D．c-erbB-2
E．N-myc
参考答案：B, C, D, E
Jenny hopes that Mr.Smith will suggest a good way to have her written English in a short
period. [ ]
A.improved
B.improving
C.to improve
D.improve
中间调又叫做（）。
A、淡调子
B、轻调子
C、明调子
D、标准调
