echostr_replace（&39;a&39;,&39;e&39;,&39;-e考试网

单选题

已知charx[]=hello，y[]={&39;h&39;，&39;e&39;，&39;a&39;，&39;b&39;，&39;e&39;};，则关于两个数组长度的正确描述是（）

A.相同 B.x大于y C.x小于y D.以上答案都不对

答案

单选题

某船由32°02&39;S,115°10&39;E航行至06°39&39;N,79°30&39;E,则相应的大圆航程为（）

A.3089 n mile B.3210 n mile C.3189 n mile D.3310 n mile

答案

单选题

echostr_replace（&39;a&39;,&39;e&39;,&39;banana&39;,$count）;echo$coun运行结果为（）

A.banana B.benene C.banana3 D.benene3

答案

单选题

若有说明:charc[10]={&39;E&39;,&39;a&39;,&39;s&39;,&39;t&39;,&39;&39;};，则下述说法中正确的是（）

A.c[7]不可引用 B.c[6]可引用，但值不确定 C.c[4]不可引用 D.c[4]可引用，其值为空字符

答案

单选题

Review the definition of the phone_list view. CHEATE OR REPLACE ALGORITHM=MERGE DEFINER= 'root'@localhost' SQL SECURITY DEFINER VIEW 'phone_list' AS SELECT e . id as id 'e . first_name AS 'first_name' 'e . last_name AS 'last_name' 'coalesce ( ph1.phone_no, ' – ') AS 'office_no' 'coalesce (ph2 .phone_no, ' – ') AS 'cell_no' FROM employees e LEFT JOIN employee_phone ph1 ON ph1.emp_id = e.id AND ph1.type = 'office' LEFT JOIN employee_phone ph2 ON ph2 .emp_id = e.id AND ph2 .type = 'mobile' The tables employees and employee_phone are InnoDB tables; all columns are used in this view. The contents of the phone_list view are as follows: Mysql> select * from phone_list; 1 row in set (0.00 sec) Which method can you use to change the cell_no value to '555-8888' for John Doe?（）

A.INSERT INTO employee_phone (emp_id, phone_no, type) VALUES (1, '555-8888','mobile') B.UPDATE phone_list SET cell_name '555-8888' WHERE first_name= 'John' and last_name= 'Doe' C.DELETE FROM phone_list WHERE first_name= 'John' and last_name= 'Doe'; INSERT INTO phone_list (first_name, last_name, office_no, cell_no) VALUES ('John' , 'Doe' , 'x1234' , '555-8888) D.UPDATE employee_phone SET phone_no= '555-8888' where emp_id=1

答案

单选题

Review the definition of the phone_list view. CHEATE OR REPLACE ALGORITHM=MERGE DEFINER= 'root'@localhost' SQL SECURITY DEFINER VIEW 'phone_list' AS SELECT e . id as id 'e . first_name AS 'first_name' 'e . last_name AS 'last_name' 'coalesce ( ph1.phone_no, ' – ') AS 'office_no' 'coalesce (ph2 .phone_no, ' – ') AS 'cell_no' FROM employees e LEFT JOIN employee_phone ph1 ON ph1.emp_id = e.id AND ph1.type = 'office' LEFT JOIN employee_phone ph2 ON ph2 .emp_id = e.id AND ph2 .type = 'mobile' The tables employees and employee_phone are InnoDB tables; all columns are used in this view. The contents of the phone_list view are as follows: Mysql> select * from phone_list; 1 row in set (0.00 sec) Which method can you use to change the cell_no value to '555-8888' for John Doe?（）

A.INSERT INTO employee_phone (emp_id, phone_no, type) VALUES (1, '555-8888','mobile') B.UPDATE phone_list SET cell_name '555-8888' WHERE first_name= 'John' and last_name= 'Doe' C.LETE FROM phone_list WHERE first_name= 'John' and last_name= 'Doe'; INSERT INTO phone_list (first_name, last_name, office_no, cell_no) VALUES ('John' , 'Doe' , 'x1234' , '555-8888) D.UPDATE employee_phone SET phone_no= '555-8888' where emp_id=1

答案

单选题

由起航点30°10&39;N,120°08&39;E至到达点10°30&39;N,145°05&39;E的纬差与经差为（）

A.44°40N,024°57E B.19°40S,024°57E C.19°40N,024°57W D.40°40S,024°57W

答案

单选题

设无向图G=（V,E）和G&39;=（V&39;,E&39;），如果G&39;是G的生成树，则下面的说法中错误的是（）

A.G为G的子图 B.G为G的连通分量 C.G为G的极小连通子图且V=V D.G是G的一个无环子图

答案

单选题

int A = 55;char B = 'E';System.out.println（A + B）（）

A.65 B.124 C.55 D.175

答案

单选题

已知&39;a&39;的ASCII码是97，则语句printf（%d,&39;e&39;）;输出结果是（）

A.语句错误 B.e C.101 D.e

答案

echostr_replace（&39;a&39;,&39;e&39;,&39;banana&39;,$count）;echo$coun运行结果为（）

A. banana

B. benene

C. banana3

D. benene3

相关试题

echostr_replace（&39;a&39;,&39;e&39;,&39;banana&39;,$count）;echo$coun运行结果为（）

A. banana B. benene C. banana3 D. benene3

相关试题

A. banana

B. benene

C. banana3

D. benene3