Icewedgesformwhenwaterrunsintocracksintheground,thepermafrost,then freezes.Youeverseemudafteritdries?Driedmudhascracks,becausewhenitdries, itcontracts,itshrinks. Well,inwinter,permafrostbehavessimilarly.Itshrinksinwinter,becauseitfreezes evenmorethoroughlythen,andasitshrinks,itformsdeep,deepcracks.Theninthe sum...
托福听力tpo43 lecture1、2、3、4 原文+题目+答案+译文 托福听力tpo43lecture1、2、3、4原文+题目+答案+译文Lecture1 (2)原文 (2)题目 (4)答案 (6)译文 (6)Lecture2 (7)原文 (7)题目 (10)答案 (12)译文 (12)Lecture3 (14)原文 (14)题目 (16)答案 (18)译文 (19)Lecture4 (20)原文 (20)题...
Most crystalline rocks are much more solid; a common exception is basalt, a form of solidified volcanic lava, which is sometimes full of tiny bubbles that make it very porous. 1 The proportion of empty space in a rock is known as its porosity. But note that porosity is not the same as...
②The craft workers creating precious works in such materials as gold, Ivory, and semiprecious stones may well have been fulltime craft specialists, totally dependent on the palaces and working constantly within them, their products in demand both tor immediate use and possibly foe exchange quite ...
The craft workers creating precious works in such materials as gold, Ivory, and semiprecious stones may well have been fulltime craft specialists, totally dependent on the palaces and working constantly within them, their products in demand both tor immediate use and possibly foe exchange quite ...
Most crystalline rocks are much more solid; a common exception is basalt, a form of solidified volcanic lava, which is sometimes full of tiny bubbles that make it very porous. The proportion of empty space in a rock is known as its porosity. But note that porosity is not the same as ...
解题:根据题干回原文定位,定位词为“basalt”, “unlike”,“crystalline forms of rock”,据此可定位在原文中第二句“Most crystalline rocks are much more solid; a common exception is basalt,a form of solidified volcanic lava, which is sometimes full of tiny bubbles that make it very porous.”注意...
Within Within Within the the the ocean, ocean, ocean, the the the production production production of of of limestone, limestone, limestone, in in in the the the form form form of of of calcium carbonate skeletons or shells, also reduces atmospheric carbon calcium carbonate skeletons or shells...
C.By driving out the tyrants,Cleisthenes enabled the reforms that had been under way since the end of the century to reach their final form in 508 B. C. D. Toward the end of the century, the tyrants were driven out, and in 508 B...
As lava flows and spreads to form a shield volcano, the volcano’s eventual height depends on the new mountain’s ability to support its own weight. The lower the gravity, the lesser the weight and the greater the height of the mountain. It is no accident that Maxwell Mons on Venus and...