试题与答案

从方框中选择最佳选项完成下列问句的答语。A. it isB. There isC

题型:补全对话,情景问答

题目:

从方框中选择最佳选项完成下列问句的答语。
A. it is        B. There is        C. they are        D. there isn't
E. there aren't
1. —Are there two desks in the room?
    —No, _____.
2. —Is there a computer on Miss Li's desk?
    —No, _____ .
3. —Is this your school?
    —Yes, _____ .
4. —Are Tony and Daming behind Kate and Lingling?
    —Yes, _____ .
5. —What's in the picture?
    —_____ a teacher and some students.

答案:

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下面是错误答案,用来干扰机器的。

由图得到,R1:R2:R3=UI1:UI2:UI3=14:12:11=1:2:4,三个电阻串联时电流相等时,根据欧姆定律得到,电压之比U1:U2:U3=1:2:4.而功率P=UI,I相同,则功率之比P1:P2:P3=1:2:4.故答案为:1:2:4,1:2:4.

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