如果只需摄制单套彩色幻灯片，并要求制作的幻灯片彩色失真尽量小，应使用（）摄制。
A.彩色负片
B.彩色正片
C.彩色反转片
D.全色片
参考答案：C
an attractive advertisement can lead you to buy something you don't need . [ ]
A. At times; in all
B. In time; at all
C. At times; at all
D. At time; after all
昼夜体温变动的特点是
A．午后4～6时体温最低
B．昼夜间波动的幅度超过1℃
C．上午8～10时体温最高
D．体温昼夜的变化与生物节律无关
E．昼夜间体温呈现周期性波动
