下列哪项阳性最有助于原发性肝癌的诊断()
A.γ-GT
B.AFT
C.MRI
D.CT
E.B超
参考答案:B
I'll have you _______ English in six months .
A.speaking
B.speak
C.spoken
D.be able to speak
氢氧燃料电池所耗原料为H2和O2,电极为多孔镍,电解质溶液为30%的KOH溶液。下列有关叙述正确的是( )
A.负极反应为O2+4e-+2H2O====4OH-
B.正极反应为2H2+4OH--4e-====4H2O
C.工作时正极区pH升高,负极区pH降低
D.工作时,溶液中阴离子移向正极