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>更新时间：2011-02-07 22:04:51 |
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| 简 介 |
It was July 1976. An unmanned spaceship, Viking One, had arrived at Mars.
On July 20th, the spaceship 1 . Part of it continued toward a landing on the planet. It fell 2 through the late afternoon Mars’ sky.
Forty kilometers above the planet, the thin 3 began to slow its fall. Six kilome-ters above the planet, a big parachute opened. The landing craft fell more slowly. Then, three rocket engines 4 . And the landing craft set down 5 on the surface. A 6 in the Viking One Lander immediately sent a message to the earth. It said, “I am here. I am down safely. I am beginning my work.”
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