癌基因表达产物属于信息传递分子的是()
A．sis
B．ras
C．myc
D．myb
E．src
参考答案：B
----You seem to have known Dr Smith for a long time.
---- That’s true. ______ he joined our club six years ago.
A．Since
B．Until
C．When
D．Before
EISU在基本配置下可以提供（）路通用AI/DI测量通道。
A.8
B.10
C.12
D.16
