学生实验小组进行“测定金属丝电阻率”的实验 小题1:用螺旋测微器测量金属丝的直径

题型:实验题

问题:

学生实验小组进行“测定金属丝电阻率”的实验

小题1:用螺旋测微器测量金属丝的直径如左下图所示,则它的读数是       mm。用多用电表的电阻“×1”挡,按正确的操作步骤粗略测量金属丝的阻值,表盘的示数如右下图所示,则它的读数是     Ω。

小题2:该组同学想用伏安法更精确地测量其电阻Rx,已经选好的器材有:

A.电流表(量程0~0.6A,内阻约几欧)

B.电压表(量程0~3V,内阻约20kΩ)

C.电源(电动势3V,内阻很小)

D.若干导线和电键实验室有两种滑动变阻器备选:

E滑动变阻器(阻值范围0~500 Ω)

F.滑动变阻器(阻值范围0~10Ω)

请帮该实验小组选择合适的滑动变阻器:      (填字母序号),并设计实验的最佳电路,将电路图画在下面的方框中。

小题3:按你设计的最佳电路在实物图中将缺少的导线连上去。

考点:实验:伏安法测电阻实验:练习使用示波器实验:测绘小灯泡的伏安特性曲线实验:探究影响导体电阻的因素
题型:实验题

阅读理解

It was Zhang Lei’s first time to visit Singapore. He lived in his uncle’s home. It was sunny most days. He visited many places and had many kinds of nice food. Linda spent her vacation in Hawaii. She had a great time there. The beaches were beautiful and the weather was fine.  She had lots of delicious food.  People there were friendly. Mrs. Brown didn’t enjoy her vacation in London. The bus trip was boring.  And it rained every day, so she stayed at the hotel for 6 days. On the last day, she went shopping.  But the shops were crowded and things were really expensive.

根据短文内容,回答下列问题。

小题1:Where did Zhang Lei live when he was in Singapore?

___________________________________________________

小题2:How was the weather in Singapore?

___________________________________________________

小题3:Where did Linda go on vacation?

___________________________________________________

小题4:How were the people in Hawaii?

___________________________________________________

小题5:Why did Mrs. Brown stay in the hotel for 6 days?

___________________________________________________

题型:实验题

赔偿请求人单独提起行政赔偿诉讼的,其时效期限为:( )

A.向赔偿义务机关递交赔偿申请后2个月届满之日起3个月内提出

B.应于行政机关作出职务侵权行为之日起届满3个月内提出

C.应于行政机关作出职务侵权行为之日起届满2个月内提出

D.应于赔偿义务机关作出不予赔偿决定后自通知送达之日起3个月内提出

题型:实验题

班结对账成功后,系统会自动比较加油机的开、结班泵码并值和所有零管系统中POS中油品销售的总量,若二者差值大于(),可中止班结。

A、0.001L

B、0.01L

C、0.1L

D、1L

题型:实验题

蒸汽品质不良有哪些危害?

题型:实验题

患者,男,60岁,胃癌晚期,体温39.5℃,护士按医嘱给患者行乙醇拭浴降温。如患者出现面色苍白、寒战,或出现脉搏、呼吸异常时,应该()

A.嘱患者坚持一下

B.立即停止并报告医生

C.嘱患者深呼吸

D.暂停片刻后继续

E.为患者增加一床棉被后继续输液

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