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【单选题】

航空鱼雷入水姿态角最大允许( )

A.
80 度
B.
65 度
C.
45 度
D.
30 度
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参考答案:
参考解析:
.
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【单选题】有机物进入水体,在有溶解氧的条件下,()。

A.
由于厌氧微生物的降解作用,有机物被分解为CO2、H2O和NH3,同时合成新细胞,并增加水体中的溶解氧
B.
由于好氧微生物的降解作用,有机物被分解为CO2、H2O和NH3,同时合成新细胞,并增加水体中的溶解氧
C.
由于厌氧微生物的降解作用,有机物被分解为CO2、H2O和NH3,同时合成新细胞,并消耗水体中的溶解氧
D.
由于好氧微生物的降解作用,有机物被分解为CO2、H2O和NH3,同时合成新细胞,并消耗水体中的溶解氧

【单选题】Part ADirections: Read the following four texts.Answer the questions below each text by choosing A, B, C or D .Mark your answers on ANSWER SHEET 1.It was the worst tragedy in maritime (航海的) history, s...

A.
It was attacked by Russian torpedoes.
B.
Most of its passengers were frozen to death.
C.
Its victims were mostly women and children.
D.
It caused the largest number of casualties.