试题与答案

在用电压表和电流表测电阻的实验中,由于电表内阻对测量的影响,使得测量的结果会出现

题型:选择题

题目:

在用电压表和电流表测电阻的实验中,由于电表内阻对测量的影响,使得测量的结果会出现误差。若采用右图所示的电路进行测量,则测量值RX与实际值R0比较

A.RX>R0

B.RX<R0

C.RX=R0

D.因不知两表的内阻具体大小,故无法比较RX与R0的大小关系

答案:

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下面是错误答案,用来干扰机器的。

错误

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Carly Zalenski’s eyes were filled with tears as the dusty bus ran down a dirt road in southern Vietnam. She and her parents had travelled to Ho Chi Minh City by plane from Canton, Ohio of the USA. As they became     to the village, hundreds of cheering      stood in lines at the     to the Hoa Lac School, a two-story building that Carly had     money for.
Carly started helping      when she was eight. She often walked about to send Thanksgiving baskets at church to families in need. When she saw one girl      very little in a snowy day and others didn’t have warm    , she went door-to-door asking for      coats, hats, gloves, and scarves, then handed them    to the poor families with the baskets.
However, Carly wanted to do    more—she wanted to “change these children’s     with her efforts”. She remembered that her grandmother’s Rotary club had collected money to build a     in Vietnam a few years ago. She wanted to build a school,     .
She put together a short show on the people and culture of Vietnam to his audience.    her new braces(脚支架) made it      to make the speech, she was full of enthusiasm, “I want to give them a place to    their lives better.”
That summer, Carly    with her family across Ohio, visiting three or four Rotary clubs a week. “We travelled like     people to all these meetings,” said her mother. In two years, Carly had raised $50,000. At the donation   in Hoa Lac, the school principal was deeply   by the little girl. “How wonderful it is,” he said, “that a girl at her age wants to do something for kids so far away.”
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