某电阻两端的电压为3V时，通过的电流为0.5A，则该电阻的阻值是　 ____Ω，若该电阻两端电压为0，其阻值是　 ____Ω

从右栏选项中找出左栏各句的恰当应答。

                I                                                                                                   II

46. 1.Hello,Jenny speaking. ____                                             A.I like music that I can dance to.
47. 2.How often does Jeff go to the library? ____                   B. It's 876-9548.
    
48. 3.What's your telephone number?    ____                         C. They're pretty good.
    
49. 4.What do you think of the cartoons? ____                       D. Hi, Jenny. It's Steve.
    
50. 5.What kind of music do you like?  ____                            E. Hi, I'm Jack.
    

                                                                                                   F. Once a week.

判断下列图片与句子是否相符，用“正确”或“错误”表示。

—No, it's not       . It's       .