,D:y2=x,y=x-2所围,则()。
A.A
B.B
C.C
D.D
参考答案:C
解析:
画出积分区域图,化二次积分,可见只有C正确。
____ in a white uniform, he looks more like a cook than a doctor. [ ]
A. Dressed
B. To dress
C. Dressing
D. Having dressed
良好的思维品质有哪些特性