问题 问答题

如图(甲)所示,是用伏安法测定未知电阻RX的实验电路实物图.

(1)根据实验要求用笔画线代替导线连接完成实验电路实物图.

(2)闭合开关S,调节滑动变阻器观察到电表的读数如图(乙)所示,则I=______A,U=______V,RX=______Ω(结果保留一位小数).

答案

(1)把电流表、待测电阻串联接入电路,电压表并联在待测电阻两端,电流表选0~0.6A接线柱,电路图如图所示.

(2)电流表的量程是0.6A,最小分度值是0.02A,电流表示数I=0.3A;

电压表量程是3V,最小分度值是0.1V,电压表示数U=2.5V;

待测电阻阻值RX=

U
I
=
2.5V
0.3A
=≈8.3Ω.

故答案为:(1)电路图如图所示;(2)8.3.

单项选择题 A1/A2型题
阅读理解

Jerome David Salinger was an American author,best known for his 1951 novel The Catcher in the Rye,as well as his reclusive(隐居的) nature.His last original published work was in 1956 ;he gave his last interview in 1980,Raised in Manhattan,Salinger began writing short stories while in secondary school,and published the critically praised story A perfect Day for Bananafish in  The New Yorker magazine,which became home to much of his following work.    . In 1951 Salinger released his novel The Catcher in the Rye,an immediate popular success.His description of adolescent alienation(疏远) and loss of innocence in the leading role Holden Caulfield was influential ,especially among adolescent readers.The novel remains widely read,selling around 250,000 copies a year.
The success of The Catcher in the Rye led to public attention and monitor:Salinger became reclusive,publishing new work less frequently .He followed Catcher with a short story collection,Nine Stories(1953,) a collection of a short novel and a short story, Franny and Zooey(1961), and a collection of two short novels,Raise High the Roof Beam,Carpenters and Seymour: An Introduction (1963). His last published work,a short novel entitled Hepworth 16,1924, appeared in The New Yorker on June 19,1965.
Afterwards Salinger struggled with unwanted attention, including a legal battle in the 1980s with biographer Ian Hamilton and the release in the late 1990s of memoirs (回忆录) written by two people close to him: Joyce Maynard, an ex-lover,and Margaret Salinger, his daughter .In 1996 ,a small publisher announced a deal with Salinger to publish Hapworth16,1924, in book form, but amid the ensuing publicity, the release was indefinitely delayed.He made headlines around the globe in June 2009, after filing a lawsuit against another writer for copyright infringement (侵犯) resulting from that writer’s use of one of Salinger’s characters from The Catcher in the Rye. Salinger died of natual causes on January 27,2010, at his home in Cornish, New Hampshire.
1.When did J.D.Salinger start to writing short stories?
A.In 1965.
B.In 1951.
C.While he served in World War Ⅱ.
D.When he studied in secondary school..
2.The underlined part “The New Yorker magazine,which became home to much of his following work.”tells us ______.
A.later he worked in The New Yorker magazine
B.many of his works were published in The New Yorker magazine
C.his home was moved into The New Yorker magazine
D.he felt at home when in The New Yorker magazine
3.Which of the following is TURE about Hapworth 16,1924?
A.Its release was definitely delayed.
B.It was published in The New Yorker
C.A small publisher published Hapworth 16,1924, in book form.
D.Up to today it hasn’t come out yet.
4.J.D.Salinger filed a lawsuit against another writer  ______.
A.to make headlines around the globe
B.to struggle with unwanted attention
C.to protect his own copyright
D.to use one of his own characters from The Catcher in the Rye