数据库中SAILORS表是由joe创建的.在DBMS完成下面的语句后Grant select on Sailors To Art With Grant option...Joe执行Grant select,update on Sailors To Bob With Grant option...Joe执行Grant select on Sailors To Bob With Grant option...Art执行Revoke select on Sailors From Art Cascade...Joe执行Bob对Sailors表拥有[1分]

Ships are but boards, sailors ... These lines ______.

关系模式Sailors(sid,lastname.firtname,age,ratring)，其中lastname允许为空. 下面哪个语句能够查找出lastname属性值不为空的水手信息. A: SELECT * FROM SAILORS WHERE LASTNAME<>’NULL’ B: SELECT * FROM SAILORS WHERE LASTNAME<>NULL C: SELECT * FROM SAILORS WHERE LASTNAME IS not NULL D: SELECT * FROM SAILORS WHERE LASTNAME not LIKE ’NULL’

The sailors cast the boat off and allowed it to drift away on the tide. A: blow B: float C: take D: wander

Who were the first Chinese immigrants inthe UK(Britain)? A: labors and sailors B: artists and singers C: scholars and students

For more than a millennium, generations of Chinese who live near the sea have worshipped the goddess Mazu, a woman with magical powers who rescued sailors ______ disaster.

When the people saw the land,（） A: only passengers were glad B: the sailors had to swim ashore C: they were surprised at the news that some ships never arrived D: all of them were excited

What is the response from Okinawa residents? A: They think highly of the United States Navy. B: They order all sailors’ returning by midnight. C: They demand the removal of US bases. D: They urge local police to investigate the incident.

The working condition of the sailors was very hard. （） A: They often had to set the sails in bad weather. B: So they had less courage. C: They were happy to be swept overboard in a strong wind. D: A 70-day-jouruey across the Atlantic was their happiest thin

Why does the author mention the Flying Dutchman?___ A: as the basis of primitive navigation systems B: as an example of a commonly sighted phantom ship C: as the reason why many sailors have mental problems D: as an explanation for sightings of phantom ships