下列幻灯片元素中哪项无法打印输出？（）
A.幻灯片图片
B.幻灯片动画
C.母版设置的企业标记
D.幻灯片
参考答案：B
下列说法中错误的是[ ]
A．人工降雨中利用干冰升华吸热
B．冬天早晨常常下霜，是凝华现象
C．饮料中的冰块体积减小是熔化现象
D．夏天打开冰棍的包装纸，有“白气”生成，是汽化现象
New York, also ________ Big Apple, becomes one of the world's greatest business centers. [ ]
A. known
B. known as
C. known to
D. known for
