Customer类中有一个Set类型的orders属性，用来存放Order订单对象，在Customer.hbm.xml文件中，用哪个元素映射orders属性？（）A、＜set＞B、＜one-to-many＞C、＜many-to-one＞D、＜property＞

阅读下列说明、图以及Java程序。

[说明]

某订单管理系统的部分UML类图如下图所示。

上图中，Product表示产品，ProductList表示所销售产品的列表，Order表示产品订单，Orderltem表示产品订单中的一个条目，OrderList表示订单列表，SalesSystem提供订单管理系统的操作接口。各个类的部分属性和方法说明如下表所示。

可以使用类java.util.ArrayList＜E＞米实现对象的聚集关系，如上图中OrderList与 Order之间的聚集关系。

for-each循环提供了一种遍历对象集合的简单方法。在for-each循环中，可以指定需要遍历的对象集合以及用来接收集合中每个元素的变量，其语法如下：

for(用来接收集合中元素的变量：需要遍历的对象集合)

如果要使用for-each循环来遍历对象集合，那么包含该对象集合的类必须实现接口 java.util.Iterable＜T＞。

Java程序7-1和Java程序7-2分别给出了类OrderList和方法statistic的Java代码

[Java程序7-1]

import java.util.*;

public class OrderList (1) {

private ArrayList＜Order＞ orders;

public OrderList0 {

this.orders = new ArrayList＜Order＞();

}

public void addOrder(Order orde0

this.orders.add(order);

}

public Iterator＜Order＞ iterator() {

return (2);

}

public iht getNumberOfOrders0 {

return this.orders.size();

}

}

[Java程序7-21]

import java.u61.*;

public class SalesSystem {

private ProductList catalog;

private OrderList sales;

private static PrintWriter stdOut = new PrintWriter(System.out, true);

public void statistic() {

for (Product product: (3)) {

iht number = 0;

for (Order order: (4)) {

for ((5): order) {

if (produet.equals(item.getProduct()))

number += item. getQuantity();

}

}

stdOut.println(product .getCode() +" "

+ product.getDescription() +" "

+ number +" "+ number * product.getPrice());

}

}

//其余的方法末列出

}

The ORDERS table has these columns:ORDER_ID NUMBER(4) NOT NULLCUSTOMER_ID NUMBER(12) NOT NULLORDER_TOTAL NUMBER(10,2)The ORDERS table tracks the Order number, the order total, and the customer to whom the Order belongs.Which two statements retrieve orders with an inclusive total that ranges between 100.00 and 2000.00 dollars? （）

A. SELECT customer_id, order_id, order_total FROM orders RANGE ON order _ total (100 AND 2000) INCLUSIVE;

B. SELECT customer_id, order_id, order_total FROM orders HAVING order _ total BETWEEN 100 and 2000;

C. SELECT customer_id, order_id, order_total FROM orders WHERE order _ total BETWEEN 100 and 2000;

D. SELECT customer_id, order_id, order_total FROM orders WHERE order_total>= 100 and <= 2000;

E. SELECT customer_id, order_id, order_total FROM orders WHERE order_total>= 100 and order_total <= 2000;

Examine the data from the ORDERS and CUSTOMERS table.Which SQL statement retrieves the order ID, customer ID, and order total for the orders that are placed on the same day that Martin places his orders?（）

A.

B.

C.

D.