白昼视力正常，每至黄昏视物不清，称为（）
A.目昏
B.目眩
C.雀盲
D.目痛
E.目涩
参考答案：C
— What's the best food you have had in Beijing, Alex?
— Roast duck! I _____ to a famous restaurant to have it last week. [ ]
A. have gone
B. go
C. will go
D. went
在DNA复制时，能与DNA单链结合的蛋白质是（）
A．SSB
B．DnaB蛋白
C．DNA-pol I
D．DnaG蛋白
