下列说法正确的是 [ ]
A.整数包括正整数、负整数
B.分数包括正分数、负分数和0
C.有理数中不是负数就是正数
D.有理数包括整数和分数
答案:D
Not until he retired from teaching three years ago ________ having a holiday abroad.
A.he had considered
B.had he considered
C.he considered
D.did he consider
某场地三个浅层平板载荷试验,试验数据见下表。试问按照《建筑地基基础设计规范》(GB50007—2011)确定的该土层的地基承载力特征值最接近于下列哪个选项的数值?()
A.170kPa
B.165kPa
C.160kPa
D.150kPa