外币票据托收中,一般票据都注明了完整的货币符号,但有些票据的货币符号不完整,经办行应根据票据注明的()来确定票据的币种。
A.付款地
B.收款地
C.收款人
D.付款人
参考答案:A
____ help the people in the snowstorm in the south made him worried. [ ]
A. Not known how to
B. Unknown what to do to
C. His knowing not how to
D. His not knowing how to
简述主要主洗剂的类型。