保证金存款是办理（）等结算业务时收到的客户存入的保证金。
A、银行卡
B、保函
C、开立信用证
D、代客外汇买卖
参考答案：A, B, C, D
用所给词的适当形式填空
1. What are your parents (read) now?
2. Evervone (be) at home last Saturday.
3. What about____(sit) under the big tree?
4. Our English teacher____(leave) school an hour ago.
5. Look out! It's (rain). We can't go out.
在普通二次浸漆时，为什么第一次浸渍时间要求比第二次长些？
