一般来说,下列哪些物品是纯公共物品( )
A.国防 B.花园 C.教育 D.桥梁
参考答案:A
Who won________race last week?
A.100--metre
B.100—metres
C.100 metre
D.100--metre's
34,21,35,20,36,( )
A.19
B.18
C.17
D.16