单项填空。
______ you like this bike?[ ]
A. Do
B. Are
C. Does
D. Is
答案:A
地表水水源卫生防护规定,严禁捕捞、网箱养殖、停靠船只、游泳和从事其他可能污染水源的取水点周围半径为()
A.10m
B.50m
C.100m
D.500m
E.1000m