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外语
During the period 1490~1979 the main progress mentioned in this passage was ______. An invention of an Italian professor ______
During the period 1490~1979 the main progress mentioned in this passage was ______. An invention of an Italian professor ______
admin
2009-06-24
98
问题
During the period 1490~1979 the main progress mentioned in this passage was ______.
An invention of an Italian professor ______.
选项
A、gave later inventors the idea of moving air around in diving devices
B、can "clean" the air
C、was used to remove moisture
D、was nothing but a plan
答案
D
解析
由第二段中的The plan did not work, but...可知这个计划没有实施,但却为后来的发明者提供了一种思路。
转载请注明原文地址:https://kaotiyun.com/show/trHd777K
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