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【单选题】
使用 Resultset对象的 next()方法移动光标时,如果超过界限,会抛出异常,该异常通常是 。
A.
NetException
B.
AlreadyBoundException
C.
SQLException
D.
InterruptedException
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【单选题】韭菜体细胞中含有的32条染色体具有8种不同的形态,韭菜应是 [     ]
A.
二倍体
B.
三倍体
C.
四倍体
D.
八倍体
【单选题】四倍体细胞具有
A.
4条染色体
B.
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C.
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D.
4对染色体
【单选题】韭菜体细胞的32条染色体具有8种各不相同的形态,韭菜是 [     ]
A.
单倍体
B.
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C.
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A.
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B.
二倍体
C.
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D.
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