常见的胶结物类型包括硅质、钙质、铁质和泥质四个种类。
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The Second Continental Congress was held in Philadelphia, and the Continental Army and Navy were established under the command of Thomas Jefferson.
A. 对
B. 错
Westward expansion was enhanced further by the Arizona Gold Rush following the discovery of gold in that state in 1848.
A. 对
B. 错
TheColdWarafterWWIIreferstotheconfrontationbetween America and Britain.
A. 对
B. 错
WhenRooseveltwaselectedpresidentin1932,hetook"the New Deal"toovercomeemploymentandincreasethepurchasingpower.
A. 对
B. 错