(本题供使用选修3-1教材的考生作答) 如图所示,把一水平导体棒置于竖直向下的匀

题型:选择题

问题:

(本题供使用选修3-1教材的考生作答)

如图所示,把一水平导体棒置于竖直向下的匀强磁场中,棒中分别通有电流I和2I,则棒所受安培力(  )

A.通有电流I时小

B.通有电流2I时小

C.一样大

D.不能确定

考点:磁场对通电导线的作用:安培力、左手定则
题型:选择题

Jimmy lives in London and began swimming a few months ago.

He likes swimming, and often goes to the swimming pool near by his小题1:_____

house with his mother and swims there for a hour or so.          小题2:______

He was six year old last week, and his mother said, “You         小题3:______

swim quite good now, but you have never seen the sea, my        小题4:_____

child, haven’t you? Your father and I are going to take you        小题5:_____

there on Saturday, and you are going to swimming in the sea.      小题6:_______

It isn’t cold now, and it’s much nice than a swimming pool.”       小题7:_____

Jimmy’s father and mother brought him to the sea in their         小题8:_______

car on Saturday, but they stopped at the side of a small           小题9:________

harbor(港口). Jimmy got out and looked at the sea for long       小题10:______

time, but wasn’t happy. Then he said to his mother,

“Which is the shallow end, mother?”.

题型:选择题

个体发育过程中最早合成和分泌的抗体是()

A.IgG

B.IgM

C.IgA

D.IgD

E.IgE

题型:选择题

一位从事基层民政工作的全国人大代表,十几年来坚持走访当地居民家庭,记了70多本“民情日记”和“民心日记”,一次次地在人民代表大会上提出议案,帮助群众排忧解难。这表明,该人大代表[ ]

①履行了严格执法行政的义务

②履行了反映群众意见的义务

③行使了依法提出议案的权利

④履行了密切联系群众的义务

A、①②③

B、①②④

C、①③④

D、②③④

题型:选择题

实施科教兴国战略的主要措施有( )。

A.深化科技体制、教育体制的改革

B.建设高水平的科技与教育队伍

C.多渠道、多层次地增加科技、教育投资

D.切实加强党和政府对科技、教育工作的领导

题型:选择题

注射麻疹疫苗的不正确操作是()

A.于上臂外侧三角肌下缘接种

B.皮下注射

C.用碘酒棉球消毒待干后注射

D.用酒精消毒皮肤待干后注射

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