0  436184  436192  436198  436202  436208  436210  436214  436220  436222  436228  436234  436238  436240  436244  436250  436252  436258  436262  436264  436268  436270  436274  436276  436278  436279  436280  436282  436283  436284  436286  436288  436292  436294  436298  436300  436304  436310  436312  436318  436322  436324  436328  436334  436340  436342  436348  436352  436354  436360  436364  436370  436378  447090 

3.將一根電阻絲接在某恒定電壓的電源兩端,電流做功的功率為p。若將該電阻絲均勻地拉長(zhǎng)為原來(lái)的兩倍后再接入該電源。則它的功率為 [ ]

A. 4p    B.0.25p  C.16p   D.0.125p

試題詳情

2.某電路在1分鐘內(nèi)消耗的電能為100J。若電路兩端的電壓變?yōu)樵瓉?lái)的2倍,電路的電阻變?yōu)樵瓉?lái)的二分之一。此電路在1分鐘內(nèi)消耗的電能是()

A.50J                  B.200J

C.400J                  D.800J

試題詳情

1.把“8V 16W”和“12V 36W”的兩盞電燈、串聯(lián)到電壓是16V的電路中,比較兩盞電燈的實(shí)際功率,則()

A.燈的實(shí)際功率大             B.燈的實(shí)際功率大

C.兩盞電燈的實(shí)際功率一樣大         D.不能確定哪盞電燈的實(shí)際功率大

試題詳情

7. --- After reading the story about Jin Jing, I was very _______.

  --- ________. She’s really brave. (09煙臺(tái))

  A. relaxed, So was I        B. impressing, So did I

  C. impressed, So was I       D. relaxing, So I did

答案:C

試題詳情

6. -My parents never stop going on about (嘮叨) how I should study hard.

-________.(09德州)

A. So my parents do              B. Nor my parents do

C. Nor do my parents             D. So do my parents

答案:C

試題詳情

5. --- How well Susan dances! I can’t believe my eyes.

  --- ___________.(09益陽(yáng))

  A. So she does    B. So does she    C. So did she

試題詳情

4. -I hear Yang Yan made an English speech at the graduation ceremony yesterday.

-_______, and _______.(09黃岡)

A. So she did; so did I                B. So did she; so I did     

C. So she was; so I was                  D. So was she; so I was

答案:A

試題詳情

3. --- Our country is becoming richer and stronger.

  --- ________. (09綏化)

  A.So it is   B. So is it   C. It is so

試題詳情

2. -Our country is becoming richer and stronger.

      -_______.(09齊齊哈爾)

A. So it is             B. So is it           C. It is so

試題詳情

1.    --- It’s terribly cold today, isn’t it?

--- Yes. _______ yesterday.(09漳州)

A. So it was   B. So was it   C. So it is   D. So is it

答案:A

試題詳情


同步練習(xí)冊(cè)答案