边长相等的下列两种正多边形的组合,不能作平面镶嵌的是[ ]
A.正方形与正三角形
B.正五边形与正三角形
C.正六边形与正三角形
D.正八边形与正方形
答案:B
A recent survey ___ that the majority of people are worried about the present high price of apartments in cities.
A.indicates
B.includes
C.imagines
D.improves
肾移植病人术后36小时,出现少尿,血肌酐持续升高,并伴高热、寒战,提示病人出现
A.感染
B.加速性排异
C.急性排异
D.慢性排异
E.超急排异