长株潭的五大两型社会示范区分别为()、云龙示范区、昭山示范区、天易示范区、滨湖示范区。
A、大河西示范区
B、河西示范区
C、天元示范区
参考答案:A
距今170万年到公元前21世纪,是我国的原始社会时期。( )
-It's the second time that I ________ to Shanghai.
-What great changes!It's ten years since I ________ it last time.[ ]
A.have been; left
B.had been; left
C.am; had left
D.come; had left