对有规则游戏的指导要求保育员做到精心设计和选择游戏；（）。
参考答案：激发游戏的情绪
With the help of modern technology,the farmers have got twice________as they did before. [ ]
A. as much corn
B. much corn as
C. corn much as
D. corn as much
下列字符常量中，哪个表示反斜杠字符“\”
A． \'
B． \"
C． \\
D． \'\
