受力特点为中央弯矩大于四边弯矩，受力变形成锅底状的为( )板。
A．单向
B．双向
C．两边支承
D．一边固定，三边自由
参考答案：B
—We plan to visit the Summer Palace tomorrow.
—______. [ ]
A. That's sounds interesting
B. That sounds interested
C. That sounds interesting
D. That sound interested
在国务院关于发布老干部离职休养制度的几项规定的通知（国发[1982]62号）下发后，当时的国家劳动人事部连续发了三个文件进行解释，请说出这三个文件的文件号？
