期货交易所通知期货公司追加保证金，期货公司否认收到上述通知的，由期货公司承担举证责任。 ( )
参考答案：错
Usually he is Li Hua in their class. [ ]
A. comparing with
B. compared by
C. being compared with
D. compared with
试述无齿切割机的工作原理及使用中注意事项？
