在“研究磁通量变化时感应电流的方向”的实验中: (1)某同学用通电螺线管代替条

题型:实验题

问题:

在“研究磁通量变化时感应电流的方向”的实验中:

(1)某同学用通电螺线管代替条形磁铁进行如下实验操作:

A.将灵敏电流计直接与电池两极相连,检测灵敏电流计指针偏转方向与电流流向的关系;

B.按上图接好电路;

C.把原线圈放入副线圈中,接通、断开电键观察并记录灵敏电流计指针偏转方向;

D.归纳出感应电流的方向与磁通量变化的关系。

其中错误之处是____________________、____________________。

(2)已知一灵敏电流计,当电流从正接线柱流入时,指针向正接线柱一侧偏转,现把它与线圈串联接成下图所示电路,条形磁铁的磁极、运动方向及灵敏电流计的正负接线柱和指针偏转方向均如图所示,试画出螺线管上导线的绕向。

考点:探究产生感应电流的条件
题型:实验题

阅读理解。 

     Bob Pearson is an old man. He hasn't got a wife, but he is a father of four children. He has got two sons

and two daughters. One son is from England. His name is Bill. The other (另一个) son is from America. His

name is Mike. One of his daughters is from China. Her name is Lanlan. The other one is from Japan. Her name

is Mikou. Bob Pearson is not the children's real (真正的) father, but he loves them very much. The children

love their father, too. Bob Pearson gives many gifts (礼物) to the children. The girls like caps and shoes and

the boys likes bikes and footballs very much. Bob Pearson is the children's father, and he is their good friend,

too.

1. Bob Pearson has got _______.

A. a wife

B. some children

C. an old man

2. Bill is _______.

A. English

B. American

C. Japanese

3. _______ is from China.

A. Mike

B. Mikou

C. Lanlan

4. Bob Pearson gives _______ to the boys.

A. bikes and footballs

B. caps and footballs

C. bikes and shoes

5. There are _______ peoples in Bob Pearson's family.

A. four

B. five

C. six

题型:实验题

使用E_mail问卷进行市场调研()

A.尽量使用纯文本文件

B.最后传递最重要的信息

C.邮件越长越好

D.传输本文中可包含图形

题型:实验题

按财务制度规定,下列说法不正确的是()。

A.租赁设备的租金允许计入成本

B.购买设备每期计提的折旧费允许计入成本

C.用借款购买设备,其每期支付的利息可计入成本

D.其他费用保持不变的情况下,计入成本越多,则利润越多,企业缴纳所得税越少

题型:实验题

解决我国民族问题的基本原则是( )

A.实行民族区域自治
B.坚持民族平等、民族团结和各民族共同繁荣
C.尊重各民族的风俗习惯
D.尊重和保护各民族的宗教信仰自由

题型:实验题

某分项工程双代号时标网络计划如下图所示,其中工作C和I的最迟完成时间分别为第()天。

A.3和9

B.3和11

C.4和9

D.4和11

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