阅读理解

    My family is not very big. There are only three cats. I'm a white cat. My name is Snow White. My husband (丈夫) is a black cat. His name is Captain Black Cat. We have a pretty (漂亮的) daughter. Her name is Lily. She is black and white. She's two years old. We live a happy life.

    Every day we work hard to catch the mice (捉老鼠).  We help people live a happy life in this house.

某澄清溶液中存在大量的Ba²⁺、NH₄⁺、Cl^﹣，该溶液中还可能大量存在的离子是（　　）

    Many children like watching TV．It's very interesting and they can see a lot and know many things about other people．They can also learn from the radio．But they can learn easily with TV．Why? Because they can hear and watch at the same time．But they can't watch anything from the radio(收音机)．TV helps to open children's mind(思想)．They can find better ways to do things．

    Many children watch TV only on Saturday and Sunday nights．They are busy from Monday to Friday．But some children watch TV every night．They go to bed very late．It's not good for their eyes and health.

A、B是同种材料制成的电阻，它们的长度相等，A的横截面积是B的两倍，将它们并联在电路中，则加在A、B上的电压U_A、U_B和通过A、B的电流I_A、I_B间的关系正确的是（　　）

​