【单选题】High Dive Cheryl Sterns aims to go boldly where no human has ever gone before in a balloon: 40 kilometers up into the atmosphere. (46) No one has ever leapt from such a height or gone supersonicl with...
A.
It will handle several major hazards.
B.
Escape suits are tough enough to stand the atmospheric pressure of the upper stratosphere.
C.
From there, she’ll take a death-defying leap back to Earth at supersonic speed.
D.
“In 30 seconds, I’ll be going Mach (马赫) speed,” said Sterns.
【简答题】听下面一段对话,回答第1至3题。 1. What's the purpose of the writing club? [ ] A. To write articles for the Campus Literary Review. B. To teach students a couple of basic writing skills. C. To help those who wan...