1. 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?(单选) B
A)0 B)1 C)2 D)3