问题
选择题
Remove the batteries when they become weak or when the unit is not in use for extended periods. This will damage to the unit from battery leakage at such times.
A．disappoint
B．concern
C．instruct
D．prevent
答案
答案：D
词义辨析。 A. 使失望 B. 涉及；使担心 C.指导 D.预防；阻止。句意：……此时此刻，这将阻止电池漏液对这个装置的毁坏。故选D。