(7分)做测量小灯泡电功率的实验(小灯泡标有“2.0V”字样). (1)实验电

题型:实验题

问题:

(7分)做测量小灯泡电功率的实验(小灯泡标有“2.0V”字样).

(1)实验电路没有连接完整,如图甲所示,请你用笔画线代替导线,将电路连接完整。

(2)电路连接正确后,闭合开关,发现小灯泡不亮,但电流表有示数.接下来应进行的操作是         

A.更换同样规格的小灯泡

B.检查电路是否断路

C.移动滑动变阻器滑片,观察小灯泡是否发光

(3)请你在图中的虚线框内设计测量小灯泡电功率的实验数据记录表

(4)实验过程中,当电压表示数为          V时,小灯泡达到额定功率,此时电流表的示数如图乙所示,其值为        A,小灯泡的额定功率为           W.

考点:测量电功率的实验
题型:实验题

阅读下面的短文,判断文后的句子是否符合短文内容。符合的写“T”,不符合的写“F”。

                                                           

     Howard Carter was a famous explorer (探险家). He loved to visit new places. During his life, he discovered

many important and exciting things.

     Howard Carter did not go to school. But he was smart and wanted to learn the world outside his hometown.

In 1891, at the age of 17, he went to Egypt (埃及) by ship. By the 1920s, he had become an explorer, looking

for the tombs (坟墓) of the Egyptian kings.

     He found several important ones. Inside the tombs, he found jewels, gold and 10 bodies of dead kings. These

bodies are known as mummies (木乃伊). In 1922, Howard Carter made his most important discovery of all.

When Carter's team was working at a place near a city called Luxor, they found the tomb of King Tutankhamun.

     Not long after the tomb was opened, people in Carter's team began to get ill and die strangely. Within seven

years, 21 people who had something to do with the opening of the tomb died However, Howard Carter lived on

and died at the age of 65.

( )1. Howard Carter liked to visit new places.

( )2. Howard Carter was born in 1877.

( )3. Carter's team found the tomb of King Tutankhamun in 1922.

( )4. The passage tells us Carter's school life.

题型:实验题

地铁被许多专业人士认为是“很环保的工程”。如地铁以电力驱动,沿线无大气污染及水环境污染等环境问题;地铁采用冷水循环实现集中供冷,冷却塔中循环的完全是水气。轨道交通线路产生电磁辐射一般对人体健康没有影响。但是目前最直接地被关注的地铁话题是噪音和振动。 这段文字主要说明了( )。

A.地铁是很环保的工程

B.地铁无大气污染、水污染,辐射无害

C.地铁的缺陷是会产生噪音和振动

D.地铁相对环保,但也存在噪声污染和振动问题

题型:实验题

二十五岁经产妇,妊娠28周出现皮肤瘙痒,巩膜轻微发黄十余日,无其他不适。血压128/84mmHg,前次妊娠有同样病史,于产后黄疸自行消退。ALT160单位。经确诊为妊娠期肝内胆汁淤积症,对母儿无影响的是()

A.血压升高

B.胎儿窘迫

C.早产

D.死胎

E.围生儿死亡率增高

题型:实验题

根据常压电光源的特性,下列电光源中,发光效率最高的是()。

A.白炽灯

B.日光灯

C.高压汞灯

D.低压钠灯

题型:实验题

在局域网参考模型中,两个系统的同等实体按协议进行通信。在一个系统中,上下层之间则通过接口进行通信,用什么 来定义接口

A.服务原语

B.服务访问点

C.服务数据单元

D.协议数据单元

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