下列哪些因素可以是发生功血的诱因（）
A.产后
B.精神紧张
C.下腹部外伤
D.劳累
E.性生活频繁
参考答案：A, B, D
Not until this morning（）your L/C. We can（）make shipment as stipulated in the contract.
A.we receive，not
B.we have received，never
C.did we receive，hardly
D.had we received，certainly
普通柜员窗口办理的业务种类有哪些？
