问题
选择题
This is one of the means ______ the electricity energy is conducted from one place to another. [ ]
A. by which
B. by that
C. what
D. which
答案
答案：A
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This is one of the means ______ the electricity energy is conducted from one place to another. [ ]
A. by which
B. by that
C. what
D. which
答案：A