哺乳类视觉的特点与什么有关（）。
A、夜间活动
B、白天活动
C、全天活动
D、休眠
参考答案：A
Hearing that he had been appointed _____ general manger of the company, he felt a wave of excitement
flooding through his body. [ ]
A. X
B. a
C. the
D. as the
数学思维水平
