This piece of cake is _____ larger than that one.[ ]
A. bit
B. few
C. a bit
D. a few
答案:C
已知x2-8x+15=0,左边化成含有x的完全平方形式,其中正确的是( )
A.x2-8x+(-4)2=31
B.x2-8x+(-4)2=1
C.x2+8x+42=1
D.x2-4x+4=-11
预压法加固下列哪些地基时可不设置竖向排水体?
A.软土层厚度小于4m
B.软土层厚度超过4m
C.软土层含较多薄粉砂夹层
D.真空预压工程