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【单选题】
关于DriverManager和DataSource接口中getConnection()方法的区别,解释正确的是
A.
前者需要close(),而后者不需要close()
B.
前者的close()是释放Connection,而后者的close()只会把Connection归还给连接池
C.
两者没有区别
D.
DataSource的getConnection()每次创建新的数据库链接
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举一反三
【单选题】On a vessel, multiplying a load’s weight by the distance of the load’s center of gravity above the baseline results in a(n) ______.
A.
transverse moment
B.
vertical moment
C.
righting moment
D.
inclining moment
【简答题】full container load
【单选题】一名球员接球后双脚同时落地,()脚为中枢脚
A.
左脚
B.
双脚任意一脚
C.
右脚
【判断题】When a piece of materialis subjected to a load, it will deform in the direction ofthe load only.
A.
正确
B.
错误
【单选题】能有效防止仓虫产生的氧气浓度应为:
A.
25%以下
B.
8%-25%
C.
8%以下
D.
20%
E.
8%以上
【单选题】What does MBDD mean on the load waterline mark ()_.
A.
Timber tropical load waterline
B.
Timber summer load waterline
C.
Timber winter load waterline
D.
Timber winter North Atlantic load waterline
【单选题】在篮球比赛中,一名球员接球后双脚同时落地,_ _脚为中枢脚
A.
左脚
B.
双脚任意一脚
C.
右脚
【单选题】_______ is not a static load
A.
Actual weight of the ship’s structure, outfitting, equipment and machinery
B.
Ballast load
C.
Cargo load
D.
Slamming and sloshing load
【简答题】请配对如下常见电力系统符号与名称。A. B. C. D. E.
【单选题】Aboard a vessel, multiplying a load’s weight by the distance of the load’s center of gravity from the mid-ship section results in the load’s ______.
A.
LCG
B.
longitudinal moment
C.
righting moment
D.
inclining moment
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