问答题

High Dive
kilometers up into the atmosphere.(1). No one has ever leapt from such a height or gone supersonic without an airplane or a spacecraft. Yet Stems, an airline pilot, is not the only person who wants to be the first to accomplish those feats. Two other. have people an Australian man and a Frenchman, are also planning to make similar leaps.
(1). First, she'll climb into a cabin hanging from a balloon the size of a football field. Then the balloon will take her high into the's trato sphere -- the layer of Earth's atmosphere 12 to 50 kilometers above the planet. 'The ascent will take two and a half to three hours.' said Stems.”Tll be wearing a pressurized, temperature-controlled space suit.”

A.(1).
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(1).
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D.”Tll
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H.(5)Other
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