DIGITAL CLOCKS, HOWEVER PRECISE, ……… BECAUSE THE EARTH’S ROTATION...

10. - KIEM TRA TIENGANH 12 3
KIEM TRA TIENGANH 12 3

10. Digital clocks, however precise, ……… because the earth’s rotation changes slightly over the year.

A. they can not be perfectly accurate

B. not perfectly accurate

C. can not perfectly accurate

D. not be perfectly accurate