【加賴叫過去】評論
第六段：The Americans trained a chimpanzee named Ham to push buttons and pull switches. Scientists wanted to see if it was possible for humans to perform tasks while in space. Up until then, astronauts mainly sat still during spaceflight and did not do anything except during the launch and landing stages of their flight. Ham performed his tasks successfully in space and NASA used this information when they sent a man to land on the moon in 1969.選(C)