发票丢失，应于丢失的三日内书面报主管税务机关，并在报刊和电视等传播媒介上公告声明作废。
参考答案：错
They love their daughter so much that they are always ready to do everything they can ________ her happiness.
A．to make sure of
B．make sure of
C．be sure of
D．to be sure of
流水步距属于( )。
A．工艺参数
B．空间参数
C．时间参数
D．流水参数
