十月革命一声炮响,给中国送来了()。
A.马克思主义
B.列宁主义
C.科学社会主义
D.马克思列宁主义
A.马克思主义
B.列宁主义
C.科学社会主义
D.马克思列宁主义
In Kings Canyon National Park in North America, there once was a cedar tree called "Mark Twain Tree." It was 1341 years old when it was cut down in 1891. The tree began to grow from its seed in the year of 550 A.D. and was witness to many of the major events in our history. The tree was immeasurably giant and strong, yet one of its sections is now exhibited in the American Museum of Natural History. How would you describe the tree if you actually saw it? Imagine seeing the tree, how would it provoke your thoughts on the relationship between nature and human society? Please write a 250-word short essay to decribe your senses and thoughts on the "Mark Twain Tree.”
A、土越干,压实的时候越容易出现“橡皮土”
B、土的压实功能越大,得到的最优含水量也越大
C、土的种类不影响土的压实效果
D、土的级配不良,不易压实
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