Where should the tops of vents from gasoline tanks terminate?（）...

第1题

[单选题] What is the purpose of unicast reverse path forwarding?（）

A、to validate packet receipt on interfaces where the traffic should be received B、to forward packets out the interfaces where the traffic should be received C、to forward packets out the interfaces where the traffic should be sent D、to validate packet receipt on interfaces where the traffic should be sent

点击查看答案

第2题

[单选题] The EMP table contains these columns: You need to display the employees who have not been assigned to any department. You write the SELECT statement: What is true about this SQL statement?（）

A、The SQL statement displays the desired results. B、The column in the WHERE clause should be changed to display the desired results. C、The operator in the WHERE clause should be changed to display the desired results. D、The WHERE clause should be changed to use an outer join to display the desired results.

点击查看答案

第3题

[单选题] The operating cord on an inflatable liferaft should be renewed by（）.

A、removing the top half of the shell，cutting the line at its source，and renewing completely B、cutting the line where it enters the case and replacing that portion C、leaving the original line and tying another one to it so the two lines will take the strain D、an approved servicing facility ashore

点击查看答案

第4题

[单选题] The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement?（）

A、The SQL statement displays the desired results. B、The column in the WHERE clause should be changed to display the desired results. C、The operator in the WHERE clause should be changed to display the desired results. D、The WHERE clause should be changed to use an outer join to display the desired results.

点击查看答案

第5题

[单选题] The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement? （）

A、The SQL statement displays the desired results. B、The column in the WHERE clause should be changed to display the desired results. C、The operator in the WHERE clause should be changed to display the desired results. D、The WHERE clause should be changed to use an outer join to display the desired results.

点击查看答案

第6题

[单选题] The EMP table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) DEPARTMENT_ID NUMBER (6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARTMENT_ID = NULL; What is true about this SQL statement ?（）

A、The SQL statement displays the desired results. B、The column in the WHERE clause should be changed to display the desired results. C、The operator in the WHERE clause should be changed to display the desired results. D、The WHERE clause should be changed to use an outer join to display the desired results.

点击查看答案

第7题

[单选题] Gasoline tanks should be filled（）.

A、to the top to expel all vapors from the tanks B、to the top so the operator is certain how much fuel he has aboard C、with only sufficient fuel for the planned trip so excess gasoline is not carried D、to near the top with some space allowed for gasoline expansion

点击查看答案

第8题

[单选题] Gasoline tanks should be filled（）.

A、to the top to expel all vapors from the tanks B、to the top so the operator is certain how much fuel he has aboard C、with only sufficient fuel for the planned trip so excess gasoline is not carried D、to near the top with some space allowed for gasoline expansion

点击查看答案

第9题

[单选题] Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）

A、The expansion tank should be topped off B、The thermostatic water regulating valves should be manually opened C、The fuel filters should be changed D、The engine should be turned over slowly with the indicator cocks open

点击查看答案

Where should the tops of vents from gasoline tanks terminate?（）.

请使用微信扫码支付