城市郊区菜地，是指连续( )年以上常年种菜或养殖鱼、虾的商品菜地和精养鱼塘。
A．半
B．1
C．2
D．3
参考答案：D
______ is even more important is ______ as the earth cooled down, water began to appear on its surface.
A. What, that B. That, what C, That, that D. What, what
关于孕妇体内代谢的变化，下列哪项错误
A．蛋白质代谢呈正氮平衡状态
B．基础代谢率于孕晚期增加15%～20%
C．血中胰岛素值增高
D．血脂降低
E．妊娠全过程体重约增加12.5kg
