2,9,64,625,( )
A.1728
B.3456
C.7776
D.5184
参考答案:C
解析: 各项分别为21=2,32=9,43=64,54=625,65=(7776)。
游标卡尺示值受检点为41.2mm,用83块组标准系列的量块来组合时,应选用量块尺寸为()。
A.40+1.2=41.2
B.30+10+1.2=41.2
C.30+4.5+4.5+1.2=41.2
people fled from their homes because of Haiti Earthquake. [ ]
A. Thousand of
B. Two thousands of
C. thousands of