单项选择题

Find out the different sound.
A、chest
B、lunch
C、lunge
D、batch

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金山词霸的功能不包括( ) A、词典查词 B、屏幕取词 C、云存储服务 D、单词记忆
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Regarding the mechanism of ATP synthesis, which one is correct? A、ATP is synthesized from ADP and Pi in the F1 part of ATP synthase B、Only β subunits are involved in ATP synthesis C、The role of Fo is just to fix F1 in the mitochondrial membrane D、Energy is released when protons flow back against the H+ concentration gradient
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