发票应当由收款方向付款方开具，不得由付款方向收款方开具。
参考答案：错
解析：解析：特殊情况付款方也可向收款方开具。
We were cut off from the outside world by the sudden flood; what’s worse, our food ______.
A．was run out
B．was running out
C．has run out of
D．has been run out
某铸铁件浇注时的高度为400mm，其上型高度为300mm，试分别求出顶铸、中铸、底铸时的平均压头。
