急性单核细胞白血病()
A.NAP强阳性
B.t(9;22)(q34;q11)
C.PAS阳性
D.过氧化物酶阳性
E.非特异性酯酶阳性,能被NaF抑制
参考答案:E
A cat __________ fur and a tail. [ ]
A. have
B. has
C. is
D. haves
G.652常规单模光纤在1.31um色散为()
A.0ps/nm.km
B.17~22ps/nm.km
C.-1~3.5ps/nm.km
D.1~6ps/nm.km