按照银行买卖外汇的角度汇率可分为,

Wd提问: 按照银行买卖外汇的角度汇率可分为

Ai批改: Step 1: Understand the context of the question
The question is asking about the classification of exchange rates from the perspective of a bank buying and selling foreign exchange.

Step 2: Identify the relevant classifications of exchange rates
Exchange rates can be classified in various ways depending on the context, such as direct and indirect quotation, fixed and floating rates, etc、However, the question specifically asks about the perspective of a bank buying and selling foreign exchange.

Step 3: Recall the specific classifications related to bank transactions
From the bank's perspective, exchange rates are crucial for their transactions involving foreign currencies、The relevant classifications here involve how banks quote rates for buying and selling currencies.

Step 4: List the classifications relevant to bank's buying and selling activities
Banks quote two types of rates: the rate at which they buy foreign currency (buying rate or bid rate) and the rate at which they sell foreign currency (selling rate or ask rate).

Step 5: Relate the classifications to the given options
The classifications related to a bank's buying and selling activities are 买入汇率 (buying rate) and 卖出汇率 (selling rate), which correspond to the bank's perspective on exchange rates.

Step 6: Provide the appropriate classifications
The appropriate classifications are 买入汇率 (buying rate) and 卖出汇率 (selling rate), which can be translated to buying exchange rate and selling exchange rate.

The final answer is: $\boxed{买入汇率和卖出汇率}$