可以在短期出口信用保险下承保的是()。
A.预售全部货款后发货的出口贸易
B.进口贸易
C.以信用证结算的出口产品(信用期不超过180天)
D.易货贸易
参考答案:C
—How long have you been collecting shells?
—________.[ ]
A. After I left school
B. Before I move here
C. When I went to the beach
D. Since I was ten years old
常见的脱气方法有()。