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【单选题】
产生红外吸收光谱的原因是( )A.
原子内层电子能级跃迁
B.
分子外层价电子跃迁
C.
分子转动能级跃迁
D.
分子振动-转动能级跃迁
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【单选题】关于船舶电源装置下列说法错误的是____。
A.
是将其他形式的能源 ( 如机械能、化学能等 ) 转换为电能的装置
B.
在民用船舶上主发电机和应急发电机的原动机多采用柴油机
C.
蓄电池可作主电源
D.
船舶电源主要是发电机组和蓄电池
【简答题】Passage Two There are two factors which determine an individual’s intelce. The first is the sort of brain he is born with. Human brains differ considerably, some being more capable than others. B...
【简答题】链接设备端数线据端口时应注意什么? ___________ 、 ____________ 。
【单选题】If an individual has a vitamin B6 deficiency, which one of the following amino acids could still be synthesized and be considered nonessential?
A.
Tyrosine
B.
Serine
C.
Alanine
D.
Cysteine
E.
Aspartate
【单选题】If an individual has 3 gene pairs, how many different gametes can be formed if one of the gene pairs are homozygous and the remaining t wo gene pairs are heterozygous?
A.
2
B.
4
C.
8
D.
16
【简答题】There are two factors which determine an individual's intelce. The first is the sort of brain he is born with. Human brains differ considerably, some being more capable than others. But no matter...
【简答题】There are two factors which determine an individual's intelce. The first is the sort of brain he is born with. Human brains differ considerably, some being more capable than others. But no matter...
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