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单项选择题

某一匀强磁场，已知穿过磁极极面的磁通 Φ=3.84×10-5Wb ，磁极的长与宽为100px和200px，则磁极间磁感应强度为（ ）。

A.012T
B.12T
C.2T
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遇到对列车好奇的小朋友可以不用理他，以免影响工作。（）
单项选择题
水平流速,沉淀时间等（)影响悬浮颗粒在理想沉淀池中的去除率的。
A.不是 
B.是 
C.无法确定 
D.以上均不对
单项选择题
In what way is the following argument constructed? Reality shows send a bad message and help to create a cult of instant celebrity. They are typically built about shameless self-promotion, based on humiliating others and harming relationships for the entertainment of each other and the viewers at home. These programs suggest that anyone can become famous just by getting on TV and "being themselves", without working hard or having any particular talent. Kids who watch these shows will get the idea that they don"t need to study hard in school, or train hard for a regular job. So this house would clamp down the number of reality shows broadcast on satellite television channels.
A、Reasoning by causality.
B、Reasoning by authority.
C、Reasoning by principle.
D、Reasoning by analogy
A.
B.
C.
D.
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