结合ADP和Pi，催化ATP合成的是
A．F0的OSCP B．F0亚单位 C．F1的丁亚基 D．F1的β亚基 E．F1的ε亚基
参考答案：D
- Did you get a dictionary?
- No, I _____, but there were not any _____.
A．tried; to be left
B．had tried to; leaving
C．tried to; left
D．had tried; have left
先判断条件后执行循环体的循环结构是______。
A．直到型循环
B．当型循环
C．顺序结构
D．选择结构
