A.10.2500g B.10.2551g C.10.2546g D.10.2541g E.10.2559g
A.右臂長(zhǎng)76.00mm,左臂長(zhǎng)75.90mm B.右臂長(zhǎng)75.99mm,左臂長(zhǎng)76.00mm C.右臂長(zhǎng)75.90mm,左臂長(zhǎng)76.00mm D.右臂長(zhǎng)75.99mm,左臂長(zhǎng)75.90mm E.右臂長(zhǎng)76.00mm,左臂長(zhǎng)75.99mm
A.m1=m2 B.m1>m2 C.天平左臂比右臂長(zhǎng) D.天平右臂比左臂長(zhǎng) E.天平的兩臂相等