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【单选题】
在实际应用中,我们的停车冲程,一般以__船舶的惯性距离作为停车冲程。A.
船舶对地速度降到能保持舵效的最小速度时
B.
船舶对水速度降到能保持舵效的最小速度时
C.
船舶对水速度降到0时
D.
船舶对地速度降到0时
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举一反三
【单选题】It can be inferred from the passage that the author would be more optimistic about optical computing if which of the following were true?
A.
Digital partitioning algorithms could be applied to electronic, and not just optical circuits.
B.
The speed of photons could be shown to be significantly greater than that of electrons.
C.
The precision level in basic operations can be substantially increased without great expense.
D.
The accuracy of electronic circuits used to preprocess input data and post- process data could be greatly increased.
E.
The microchips optical computer systems were shown to require an increasing density of interconnections.
【单选题】镰刀型红细胞贫血病患者Hb分子中氨基酸替换及位置是 A.β链第六位Glu→Val B.α链第六位Val→Glu C.α链第六位Glu→Val D.β链第六位Val→Glu
A.
A
B.
B
C.
C
D.
D
【单选题】What do you know about acid rain from the report?
A.
It' s a kind of atmosphere.
B.
It' s a kind of air pollution.
C.
It' s a kind of moisture.
D.
It' s a kind of noise pollution.
【简答题】Digital logic and electronic circuits derive their functionality from electronic switches called transistor. Roughly speaking, the transistor can be likened to an electronically controlled valve where...
【简答题】影响地基土液化的因素主要有哪几方面?
【单选题】七肽 Ala-Ser-Val-Asp-Glu-Leu-Gly 形成 a - 螺旋,与 Ala 的羰基形成氢键的氨基酸残基是( )
A.
Ser
B.
Val
C.
Asp
D.
Glu
【简答题】某多肽的氨基酸序列如下：Glu-Val-Lys-Asn-Cys-Phe-Arg-Trp-Asp-Leu-Gly-Ser-Leu-Glu-Ala-Thr-Cys-Arg-His-Met-Asp-Gln-Cys-Tyr-Pro-Gly-Glu-Glu-Lys。
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