以下程序代码对Customer的name属性修改了两次： tx = session.beginTransaction(); Customer customer=(Customer)session.load(Customer.class, new Long(1)); customer.setName("Jack"); customer.setName("Mike"); tx.commit(); 执行以上程序，Hibernate需要向数据库提交几条update语句？

There are following business statements for an information system:①A customer submit 0 or more orders;②An order can only be submitted by one customer. There are two classes in the system “Customer” and “Order”. For each instance of Order Class, there are ____ instance(s) of Customer Class; while for each instance of Customer Class, there are ____ instance(s) of Order Class. A: (1) 1 (2) 1 B: (1) 1 (2) 1 or more C: (1) 1 (2) 0 or more D: (1) 0 or more (2) 1

在选项类图中，哪个类图中的类Order所生成的代码如下（ ） public class Order{ public Customer recipient; }

在选项类图中，哪个类图中的类Order所生成的代码如下（）public class Order{public Customer recipient;}

B2C是英文（ ）的缩写。 A: Business to Customer B: Business 2 Customer C: Customer to Customer D: Customer 2 Customer

对于下列代码： class DataServer extends Server { public String serverName; public DataServer() { serverName = "Customer Service"; super(serverName); } } 以下哪句描述是对的？

C2C Customer to Customer

In Maketing, customer needs are similar to customer wants, but different from customer demands.

【单选题】Which of the following is NOT a recognized definition of customer service? A. Customer service as an activity B. Customer service as a theory C. Customer service as performance measures D. Customer service as a philosophy

The costs of _______ are much lower than the costs of recruiting new customers. A: customer satisfaction B: customer loyalty C: customer value D: customer retention