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【单选题】
在带有UPDATE触发器的表上执行UPDATE命令时,将激活()触发器。A.
AFTER
B.
INSERT
C.
DELETE
D.
UPDATE
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【单选题】Dear Jose, You have asked me for suggestions on how to get along in the United States. It is difficult to give advice, but I have found the following 'do's' and 'don'ts' helpful. As a rule, it isn't e...
A.
smile
B.
shout
C.
talk to
D.
run
【单选题】在计算和解答系统中,要求测速发电机误差小,剩余电压低,( )的线性误差,剩余电压等方面能满足上述的精度的要求。
A.
永磁式直流测速发电机
B.
交流异步测速发电机
C.
交流同步测速发电机D电磁式直流测速发电机
【单选题】A(n) indicates that there is serious and immediate danger for vessel, crew and passenger.
A.
routine message
B.
urgency message
C.
safety message
D.
distress alert
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