单选题
The word "they" in paragraph 5 refers to ______ .
A、
practicality and rationality
B、
engineering and the liberal arts
C、
reality and noble ideals
D、
flexibility and a value system
【正确答案】
B
【答案解析】
结合上下文，很显然这个"they"是指代前一句话中的"engineering and the liberal arts”。
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