The eggshell analogy may be quite accurate since the ice could be as little as a few kilometers thick--a tree shell around what is likely a subsurface liquid ocean that, in turn, encases a rocky core.
25. A metal plate is compared favorably with linoleum as a meter surface because a metal plate (A)lasts longer (B) is less expensive (C) makes prints more quickly (D) produces a greater variety of prints
因为The number of impressions (known as the edition) that are possible from a single original varies with the material. Prints made from linoleum, which wears readily, will be fewer than those made from a metal plate, which is capable of striking fine-quality prints in the thousands
第2题B, 从这句The Cohumblan. the first paper in Washington Territory, ,newspapers served to connect settlers in frontier communities with each other and with the rnajor events of their times. 的划线推测岀contained important historical articles.
第10题, D我觉得没可能,因为Techniques used by Voyager 2 to obtain close-up images中心词是techniques, 文章不是专门阐述得到图像的技术方法