海船船员考试
单选题The object of the both-to-blame collision clause is（）.A to free the carrying ship from liabilityB to free the non-carrying ship from liabilityC to free the ship in the wrong from liabilityD to free the ship not to blame from liability
题目
to free the carrying ship from liability
to free the non-carrying ship from liability
to free the ship in the wrong from liability
to free the ship not to blame from liability
相似问题和答案
第1题：
In which four clauses can a subquery be used?（）
- A、in the INTO clause of an INSERT statement
- B、in the FROM clause of a SELECT statement
- C、in the GROUP BY clause of a SELECT statement
- D、in the WHERE clause of a SELECT statement
- E、in the SET clause of an UPDATE statement
- F、in the VALUES clause of an INSERT statement
正确答案:A,B,D,E
第2题：
Which statement is true regarding an Ethernet collision domain?（）
- A、If a router is used, the collision domain includes all devices connected to the router.
- B、If a hub is used, the collision domain is limited to each device and the hub.
- C、If a switch is used, the collision domain is limited to each device and the switch.
- D、If a bridge is used, the collision domain includes all devices connected to the bridge.
正确答案:C
第3题：
Two stations on the Ezonexam LAN transmit at the same time, resulting in a collision. What happens when a collision occurs on the network? (Choose all that apply)
A．Each device on the Ethernet segment stops transmitting for a short time.
B．A jam signal informs all devices that a collision occurred.
C．When data transmission resumes, the devices that were involved in the collision have priority to transmit.
D．The devices that are involved in the collision stops transmitting for a short time.
E．The collision invokes a random back-off algorithm.
解析：Explanation:
When a host on an Ethernet LAN has information to send, the following steps are taken:
1. A device with a frame. to send listens until Ethernet is not busy.
2. When the Ethernet is not busy, the sender begins sending the frame.
3. The sender listens to make sure that no collision occurred.
4. Once the senders hear the collision, they each send a jamming signal, to ensure that all stations recognize the collision.
5. After the jamming is complete, each sender randomizes a timer and waits that long.
6. When each timer expires, the process starts over with step 1.
Incorrect Answers:
A. Only the stations involved in the collision stop transmitting for a short time, not all stations on the LAN.
C. No priority is given to any stations once a collision has occurred.
第4题：
遇险性质包括（）。
- A、Undesg，Disstress，Fire，Flood，Collision，Ground，Listing，Singking，Adrift，Abandon
- B、Undesg，Disstress，Fire，Flood，Collision，Ground，Listing，Singking，Adrift，SART
- C、Undesg，Disstress，Fire，Flood，Collision，Ground，Listing，Singking，Adrift，EGC
- D、Undesg，Disstress，Fire，Flood，Collision，Ground，Listing，Singking，Adrift
正确答案:A
第5题：
What is true about the WITH GRANT OPTION clause?（）
- A、It allows a grantee DBA privileges.
- B、It is required syntax for object privileges.
- C、It allows privileges on specified columns of tables.
- D、It is used to grant an object privilege on a foreign key column.
- E、It allows the grantee to grant object privileges to other users and roles.
正确答案:E
第6题：
The relationship between the embedded clause and its matrix clause is one of a part to the whole.
正确答案:正确
第7题：
Which of the following statements is true regarding the VERSIONS BETWEEN clause？（）
- A、 The VERSIONS BETWEEN clause may be used in DML statements.
- B、 The VERSIONS BETWEEN clause may be used in DDL statements.
- C、 The VERSIONS BETWEEN clause may not be used to query past DDL changes to tables.
- D、 The VERSIONS BETWEEN clause may not be used to query past DML statements to tables.
正确答案:C
第8题：
A. in the INTO clause of an INSERT statement
B. in the FROM clause of a SELECT statement
C. in the GROUP BY clause of a SELECT statement
D. in the WHERE clause of a SELECT statement
E. in the SET clause of an UPDATE statement
F. in the VALUES clause of an INSERT statement
第9题：
Which two statements are true regarding an Ethernet collision domain?（）
- A、If a switch is used, the collision domain is limited to each device and the switch
- B、If a hub is used, the collision domain is limited to each device and the hub
- C、If a hub is used, the collision domain includes all devices connected to the hub
- D、If a switch is used, the collision domain includes all devices connected to the switch
正确答案:A,C
第10题：
Two stations on a LAN transmit at the same time, resulting in a collision. What happens when a collision occurs on the network?（）
- A、Each device on the Ethernet segment stops transmitting for a short time.
- B、A jam signal informs all devices that a collision occurred.
- C、When data transmission resumes, the devices that were involved in the collision have priority to transmit.
- D、The devices that are involved in the collision stops transmitting for a short time.
- E、The collision invokes a random back-off algorithm.
正确答案:B,D,E