FOCKE408条盒透明纸包装机对透明纸切割装置清洁保养时应检查（）上的主刀与副刀磨损情况。
参考答案：切割辊
The experience of the Chinese nation attests to a truth____ a nation loses in times of disaster will be made up for by her progress
A．that what
B．what
C．that
D．what that
保险需求的本身是一种（）行为。
A.消费
B.交换生产
C.创造
D.合同
