题目内容
An engineer has designed _______ robot that can work in _______ deep sea to clean waste.
A. a; the B. a; a C. /; the D. the; /
【答案】
A
【解析】略
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题目内容
An engineer has designed _______ robot that can work in _______ deep sea to clean waste.
A. a; the B. a; a C. /; the D. the; /
A
【解析】略