When was Viking I lunched and when did it arrive at Mars?
A. 20 August 1975,19 June 1976
B. 9 September 1975,7 August 1976
C. 20 November 1975,19 December 1976
D. 7 August 1975,7 September 1976
Answer:A
When was Viking I lunched and when did it arrive at Mars?
A. 20 August 1975,19 June 1976 B. 9 September 1975,7 August 1976 C. 20 November 1975,19 December 1976 D. 7 August 1975,7 September 1976