下图为农村小水库大坝的几种设计方案图（俯视图），若从安全牢固的角度考虑，应该选择的一种方案是[ ]
A．
B．
C．
D．
答案：D
—________did your uncle leave his hometown?
—He ________ for nearly twenty years.
A．When; has left
B．When; has been away
C．How long; has left
D．How long; has been away
在2009年的资金来源中，个人按揭贷款比国内贷款低（）个百分点。
A．3.4
B．3.8
C．4.9
D．5.6
