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【简答题】
简述光纤波导色散与光纤折射率分布参数 g 的关系。
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举一反三
【单选题】曝气池混合液SVI指数是指( )。
A.
曝气池混合液悬浮污泥浓度
B.
曝气池混合液在1000mL量筒内静止沉淀30min后活性污泥浓度
C.
曝气池混合液静止沉淀30min后，每单位质量干泥形成湿污泥的体积
D.
曝气池混合液中挥发性物质所占污泥量的比例
【单选题】A concluding paragraph is your chance to_______.
A.
remind the reader of your suggestions
B.
remind the reader of your thesis idea
C.
bring the paper to a natural and graceful end
D.
both B and C
【简答题】对第一类负荷要求必需有( )供电。
【单选题】曝气池混合液SVl指数是指（）。
A.
曝气池混合液悬浮污泥浓度
B.
曝气池混合液在1000mL量筒内静止沉淀30min后，活性污泥所占浓度
C.
曝气池混合液静止沉淀30min后，每单位重量干泥形成湿污泥的体积
D.
曝气池混合液中挥发性物质所占污泥量的比例
【单选题】A recent article suggests that the introduction of the new iPhone 5 increased the demand for iPhone protective cases. The article suggests that these two goods are
A.
substitutes and their indifference curves are close to being straight lines.
B.
complements and their indifference curves are close to being straight lines.
C.
substitutes and their indifference curves are close to being L shaped.
D.
complements and their indifference curves are close to being L shaped.
【多选题】A concluding paragraph is your chance to_______.
A.
remind the reader of your suggestions
B.
remind the reader of your thesis idea
C.
bring the paper to a natural and graceful end
D.
all right
【单选题】The article suggests that .
A.
a woman can do all kinds of professional jobs better than a man
B.
woman cannot learn to use typewriters
C.
all nurses are rich and well-educated women
D.
nursing is a good profession for women
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