车客位日以每辆车的完好车日分别乘其规定载客位加总求得。
参考答案：错
发动机的有效功率与指示功率之比称为（）。
To prevent the buyer from opening the L/C late，the exporter should stipulate at the same time in the contract：“The relevant L/C must reach the seller not later than one month before the date of the shipment”．( )
