2. 外语
  3. A、The first GPS satellite was launched in 1947. B、Old satellites will be replaced after five years. C、It is operated by the Unit

A、The first GPS satellite was launched in 1947. B、Old satellites will be replaced after five years. C、It is operated by the Unit

admin2022-12-28  87
问题
选项 A、The first GPS satellite was launched in 1947.
B、Old satellites will be replaced after five years.
C、It is operated by the United States Department of Defense.
D、A few fees will be charged if we use the system.
答案C
解析
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