小萱想利用一块电流表和阻值已知的电阻R₀测量未知电阻R_X的阻值。小萱选择了满足实验要求的实验器材，并连接了部分实验电路，如图所示。

（1）为了测量未知电阻R_X的阻值，请你只添加两根导线将实物电路图补充完整。

（2）请你将正确的操作步骤补充完整：连接好电路后，只闭合开关S₂，读出电流表的示数I₁；       ，读出电流表的示数I₂，并记录I₁、I₂的数据；

（3）请你用I₁、I₂和R₀表示未知电阻R_X。R_X ＝       ，并记录。

Before she appeared on the reality show(真人秀) Britain’s Got Talent, Susan Boyle was just an ordinary middle-aged British woman. Now all this is going to change.

She lives in a house with her cat Pebbles in a tiny Scottish town. Because of learning difficulties, she doesn’t have much education. But what she does have is a very good voice. As a kid, she sang in church and choirs and school plays. For a living, she sang at local pubs.

When she took the stage on April 10^th her hair was untidy and her clothes seemed just one step up from rags. The audience laughed at her.

But then she opened her mouth. A few bars into the song and the laughing audience went silent. A beautiful voice was singing I Dreamed a Dream from the musical Les Miserables. Everyone was amazed. At the end of her song, the audience jumped to their feet and applauded wildly.

Almost overnight, Susan became a household name. She won fans and millions of admirers. Her online videos have drawn over 85.2 million hits.

Susan’s story proved the truth of an old saying: “Never judge the book by its cover.” Susan may look ordinary, and doesn’t have much dress sense, but she can certainly sing.

Susan’s fans admire her courage, as much as they do her voice. She has experienced mockery and many disappointments, but her love for music has kept her going, which is worth anyone’s respect.

小题1:According to the passage, Susan Boyle _______.

A．is a famous young actress

B．became famous after a show

C．used to be a good student

D．is good at dancing and has millions of admirers小题2:The underlined phrase “just one step up from” in the third paragraph probably means______.

A．far from

B．close to

C．different from

D．the same as小题3:The audience jumped and applauded wildly because__________.

A．her hair was untidy and her clothes seemed just one step up from rags

B．she looked very funny

C．she sang so well that everyone was amazed

D．she made a foolish mistake in the end小题4:Susan Boyle has many fans now because of _______.

A．her beautiful face

B．her knowing how to dress

C．her good education

D．her beautiful voice and courage小题5:The passage is mainly about___________.

A．how to win fans

B．how to sing well

C．a woman’s sudden success

D．a woman’s simple life