哈罗德经济增长模型认为，如果有保证的增长率大于实际增长率，经济就会出现高涨。
参考答案：对
— We didn't see you at this morning's meeting.
— ______, but if I hadn't had to meet a friend, I would have been there. [ ]
A. I'm sorry
B. Me, too
C. Never mind
D. Thank you
同属圆口纲的七鳃鳗与盲鳗的内耳结构不同。（）
