恩格尔系数是指()
A.食品支出额与总收入的比例
B.食品支出额与消费支出总额的比例
C.消费支出与总收入的比例
D.消费支出与食品支出的比例
参考答案:B
We were all very much attracted by the beautiful scenery ____ we set foot in the village. [ ]
A. quickly
B. suddenly
C. finally
D. immediately
下列哪种CT平扫时的改变,见于阿米巴性肝脓肿( )。
A.高密度 B.低密度 C.等密度D.混杂密度 E.低+等密度