在SQL Server 2000中，有学生表（学号，姓名，年龄，所在系），学号是主码。在这个表上建有视图V1,V1视图的定义语句为：　　CREATE VIEW V1 AS　　SELECT姓名，年龄，所在系FROM学生表　　WHERE年龄>=（SELECT AVG（年龄）FROM学生表）　　有下列操作语句：　　I.UPDATE V1 SET年龄=年龄+1　　II.SELECT*FROM V1 WHERE年龄>20　　III.DELETE FROM V1 WHERE年龄>20　　IV.INSERT INTO V1 VALUES（，张三，20,‘计算机系’）　　以上语句能正确执行的是

A．仅I和II

B．仅II

C．仅II和IV

D．仅I、II和III

The nurse is caring for a client with acute pulmonary edema. To immediately promote oxygenation and relieve dyspnea, which of the following interventions is appropriate

A．Administer oxygen.

B．Have the client take deep breaths and cough.

C．Place the client in high Fowler's position.

D．Perform chest physiotherapy.