A-A+
What did NASA do with the water filter technol
问题详情
What did NASA do with the water filter technology？
A．It invented the water filters.
B．It improved the water filters.
C．It abandoned the water filters in spaceships.
D．It popularized the water filters in the 1950s.
参考答案
正确答案：B
解析：原文该句表明1950年代初期水过滤技术已经存在，NASA只是对水过滤的技术进行了改进，因此本题应选选项B。原文没有提及水过滤技术最早由准发明，A不正确；C与原文的内容相反；D中的popularized也缺乏原文依据。
