(14分)如图12所示,匀强磁场的磁感应强度方向垂直于纸面向里,大小随时间的变化

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问题:

(14分)如图12所示,匀强磁场的磁感应强度方向垂直于纸面向里,大小随时间的变化率=k,k为负的常量.用电阻率为ρ、横截面积为S的硬导线做成一边长为l的方框,将方框固定于纸面内,其右半部位于磁场区域中.求:

(1)导线中感应电流的大小;

(2)磁场对方框作用力的大小随时间的变化率.

考点:法拉第电磁感应定律
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在采用支付手续费方式委托代销商品时,委托方确认商品销售收入的时点为()。

A.委托方发出商品时

B.委托方收到受托方开具的代销清单时

C.受托方销售商品时

D.委托方收到款项时

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继发闭经患者用孕激素治疗不出现撤退性出血,提示()

A.无子宫内膜,但卵巢功能正常

B.有子宫内膜,卵巢功能正常

C.子宫性闭经

D.卵巢能分泌一定量的雌激素

E.可能是妊娠

题型:选择题

Getting paid to talk about the World Cup is a great job. I’m not a football commentator(评论员),though-just an English teacher in Japan.

I came to Japan two years ago, and didn't think I would stay, but Japan has that effect on you. People often end up living here longer than they planned. I think it’s  best to teach in a biggest city where there are other foreigners to mix with, rather than a small town where English teachers often complain of feeling like a goldfish in a bowl. Many people choose to live in Tokyo, of course, which is good for the nightlife factor. But I’d say that for general quality of living, cities of neither too large nor too small, like Sapporo where I live, are better choices.

I teach English  privately, which means I’m my own boss. If you want to devote yourself to private teaching, it’s well worth doing a TEFL course  first, because your lessons will be much better for it. The problem with private teaching is finding students; it took me a year to build up a full schedule(日程表)of private lessons, so I started out teaching in schools part-time.

Most of my foreign friends here work full-time for big English conversation schools. The salary is fine to live on. But whether you can save money depends on how much going out and traveling you do here.

The schools are reluctant to take time off –even teachers with tickets for the England-Argentina game had trouble getting the day off.

56.From the passage we know in Japan the write likes to live in_______.

A.Tokyo                            B.a small town                     C.a city of middle site                  D.a big city

57.According to the writer, one had better________first to do private teaching better.

A.take a TEFL course                                             B.decide his or her own lessons

C.find students                                                      D.build up a full schedule

58.The underlined sentence in the second paragraph implies that_______.

A.there are many foreigners in Japan                  B.Japan is good for nightlife

C.they can teach English privately in Japan 

D.Japan has something more attractive than expected

59.The underlined word“reluctant”in the passage may probably mean_____.

A.kind                        B.unwilling                 C.free                                       D.careless

题型:选择题

坚持中国特色社会主义道路必须形成的各种所有制发展的新格局是

A.协调发展
B.平等竞争
C.有强有弱
D.相互促进

题型:选择题

杆路维护工作当中在整理、更换缺损的挂钩、清除架空光缆线路上和吊线上杂物,需重点对()进行检查,及时排除“三线”交越存在的安全隐患。

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