A famous American John Muir said in 1898:"The Grand Canyon...as unearthly in the color and grandeur and quantity of its architecture as if you had found it after death on some other star."
Like Muir, those of us who stand along the rim are prompted to wonder about the unearthliness and the forces that created and are still changing this place.
After more than 100 years of studies, many things are still obscure. Today visitors come by the thousands-the great and simple of the earth-all in a spirit of marvel. Travellers come from every state of the Union, from every country in Europe and Asia, pilgrims to a shrine that is the same as the creed. ’
From the depths of the canyon comes welling silence. Seldom can you hear the rear of the river. You cannot catch the patter. Like applause, from the leaves of the cottonwoods on the shelflike plateau below you. For all sounds are swallowed in this gulf of space. "It makes one want to murmur. &qu
A. The North Rim
B. The South Rim
C. The East Rim
D. The West Rim
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A. 肺真菌感染 B. 肺栓塞 C. 胸膜间皮瘤 D. 肺结核 E. 肺鳞癌 [单选题](36769)道钉颈部磨耗达( )及以上和锈蚀严重的道钉不能使用。
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[单选题]电缆井、电缆隧道内工作时，通风设备应（）。
A.保持常开 B.间歇性开启 C.时刻准备 D.随时开启 我来回答: 提交
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