[填空题]
Space travel has never been billed {{U}} (31) {{/U}} a first-class
affair, but back in 1939 it was deemed downright uncivilized in the February 20,
1939, issue of TIME. The article summarized the British Interplanetary Society’s
prediction of {{U}} (32) {{/U}} astronauts would forgo on their
{{U}} (33) {{/U}} to the moon. Topping the list: smoking and water for
washing-and there would be just enough coffee to keep the navigators from"
{{U}} (34) {{/U}} asleep over their interminable calculations."
By
1951 space {{U}} (35) {{/U}} plans had become more grandiose. Famed
rocket scientist Wernher von Braun predicted {{U}} (36) {{/U}} a
successful Mars {{U}} (37) {{/U}} could be accomplished with
{{U}} (38) {{/U}} few as 46 rockets in a round trip that would take three
years, in a later {{U}} (39) {{/U}} with TIME, yon Braun affirmed. "Man
belongs {{U}} (40) {{/U}} he wants to go-and he’ll do plenty well when he
gets there."
With th