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3.在圖2中,AB間的電壓力30V,改變滑動(dòng)變阻器觸頭的位置,可以改變CD間的電壓,UCD的變化范圍是 [ ]

 A.0-10V                 B.0-20V

 C.10V-20V                 D.20V-30V

試題詳情

1.電阻R1、R2、R3串聯(lián)在電路中。已知R1=10Ω、R3=5Ω,R1兩端的電壓為6V,R2兩端的電壓為12V,則 [ ]

 A.電路中的電流為0.6A         B.電阻R2的阻值為20Ω

 C.三只電阻兩端的總電壓為21V      D.電阻R3消耗的電功率為3.6W

 2.如圖1所示,電源和電壓表都是好的,當(dāng)滑片由a滑到b的過(guò)程中,電壓表的示數(shù)都為U,下列判斷正確的是 [ ]

 A.a(chǎn)處接線斷開(kāi)                B.觸頭P開(kāi)路

 C.a(chǎn)、b間電阻絲開(kāi)路             D.b處接線開(kāi)路

試題詳情

93. –Who taught you to play volleyball?

  --Nobody, I learnt it by ______. (09隨州)

  A. me    B. my    C. myself

答案:C

試題詳情

92. –What are you doing this weekend?

  --I want to do _______. (09貴港)

  A. something different     B. different something

  C. anything different      D. different anything

答案:A

試題詳情

91. Friends like you make _____ a lot easier to get along in a new place. (09棗莊)

  A. me    B. that    C. you    D. it

答案:D

試題詳情

90. –Excuse me. Is this ______ book, Kangkang?

  --No, it’s not ______. (09益陽(yáng))

  A. yours, mine   B. your, mine   C. your, my

答案:B

試題詳情

89. –What do you think of the street?

  --Very beautiful. There are many tall trees on ______ side of it. (09益陽(yáng))

  A. either   B. both    C. every

答案:A

試題詳情

88. –Is this the Greens’ house?

  --No. _______ is over there. (09 威海)

  A. His    B. Their    C. Theirs    D. Them

答案:C

試題詳情

87. The doctor advised Elsa strongly that she should take a good rest, but ____ didn’t help. (09南京)

  A. she   B. it   C. which   D. he

答案:B

試題詳情

86. –Are the keys over there ______?

  --No. Go and ask Anna. They may belong to her. (09南京)

  A. you   B. your   C. yours   D. yourself

答案:C

試題詳情


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