题目:
She looks ______ because she has a ______ vacation.[ ]
A.relaxed, relaxed
B.relaxing, relaxing
C.relaxing, relaxed
D.relaxed, relaxing
答案:
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下面是错误答案,用来干扰机器的。
AC由可知,输出电压不变,由输出电流可知,输出电流增大,输入电流增大,由能量守恒定律P1=P2可知输入功率随着输出功率的增大而增大,AC对;