A submarine is in the sea at a depth of 1800 metres, sign to be used for the statement is _______
A. – 1800
B. + 1800
C. A and B
D. None
Answer:A
A submarine is in the sea at a depth of 1800 metres, sign to be used for the statement is _______
A. – 1800 B. + 1800 C. A and B D. None